A bus start moving from rest .If its velocity after 5 seconds becames 10 m/s ,find acceleration

Answers

Answer 1

Answer:

2 [tex]m/s^{2}[/tex]

Explanation:

acceleration = (final-initial velocity) / time

                     = (10-0)/5

                     =2


Related Questions

Use F = 1/T as your basis:
8. If your heart rate is 150 beats per minute during strenuous exercise, what is the time per beat in units of seconds?

The answer is 0.400 s/beats but please show your work.

Answers

Heart rate is given by

150beats/min

Convert to per second

150/60=5/2=2.5beats/s

Now

Frequency:-

[tex]\\ \rm\rightarrowtail \nu=\dfrac{1}{T}[/tex]

[tex]\\ \rm\rightarrowtail \nu=\dfrac{1}{2.5}[/tex]

[tex]\\ \rm\rightarrowtail \nu=0.4Hz[/tex]

What is current of 12 ohm? help me pleasee​

Answers

Answer:

the current of 12 ohm is 2Amps

If the barge is made out of 4.8- cm -thick steel plate on each of its four sides and its bottom, what mass of coal can the barge carry in freshwater without sinking

Answers

The maximum mass of coal that the barge will carry in freshwater without sinking is 0.111 kg.

Volume of the barge

The volume of the barge is calculated as follows;

V = L³

V = (4.8 cm)³

V = 110.6 cm³

Density of the barge

For the barge to float in freshwater, its density must be less or equal to density of water.

density(barge) = density(water)

density(barge) = 1 g/cm³

Maximum mass to be carried by the barge without sinking

mass = density x volume

mass = 1 g/cm³ x 110.6 cm³

mass = 110.6 g

mass = 0.111 kg

Thus, the maximum mass of coal that the barge will carry in freshwater without sinking is 0.111 kg.

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Brody drives 180 km in two hours. How fast is he travelling?
should be in km/hour)

Answers

Answer:

90 km/h

Explanation:

we just divide the distance by the time to get the speed.

Why wouldn’t you move during an earthquake?

Answers

Answer:

So you maybe don't fall, have something fall on you, and for a bunch of different reasons. EARFQUAKES are really dangrous.

Explanation:

Hope this helps you!

By what means can the internal energy of a closed system increase?.

Answers

Answer:

when work is done on the system or heat comes into the system


1. A hockey puck has a mass of 0.115-kg and strikes the pole of the net at (37 m/s)x. It bounces off in the opposite direction at (-25 m/s)x +(5 m/s)y. (A) What is the impulse on the puck? (B) If the collision takes .005s what is the force acted on the puck?

Answers

(a) The impulse on the puck is 1.323 kgm/s.

(b) The magnitude of the force that acted on the puck is 264.5 N.

Impulse of the puck

The impulse on the puck is equal to the change in momentum of the puck.

The change in th momentum of the puck is calculated as follows;

ΔP = m(u - v)

where;

v is the final velocity = (-25x + 5y) m/su is the initial velocity = 37 m/s

Magnitude of the final velocity

|v| = √[(-25)² + (5)²] = 25.5 m/s

ΔP = 0.115(37 - 25.5)

ΔP = 1.323 kgm/s

Thus, the impulse on the puck is 1.323 kgm/s.

Force on the puck

The magnitude of the force that acted on the puck is calculated as follows;

F = ΔP/t

F = 1.323/0.005

F =264.5 N

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Which Tesla would win in a drag race?

(A) 2009 Tesla Roadster

(B) 2016 Tesla Model X

Answers

B 2016 tesla model x

Answer:B

Explanation:  

A has about 248 hp  but B has about 683 hp. 2016 is younger too. good day

What is one time constant of a 4. 7 μf capacitor in series with a 22 kω resistor?

Answers

Hi there!

We can solve for the time constant using the following:
[tex]\tau = RC[/tex]

τ = Time Constant (s)
R = Resistance (Ω)
C = Capacitance (F)

Simply plug in the values. Remember that:
4.7 μF = 4.7 * 10⁻ ⁶ F = 0.0000047 F

22kΩ = 22 * 10³ Ω= 22000Ω

Solve:
[tex]\tau = 0.0000047 * 22000 = \boxed{0.1034 s}[/tex]

A person is dragging a packing crate of mass 100 kg across a rough horizontal floor where the coefficient of kinetic friction is 0. 400. He exerts a force f sufficient to accelerate the crate forward. At what angle above horizontal should his pulling force be directed in order to achieve the maximum acceleration?.

Answers

For a person dragging a packing crate of mass 100 kg, the angle above the horizontal  is mathematically given as

theta = 21.8 °

What angle above horizontal should his pulling force be directed in order to achieve the maximum acceleration?.

Generally, the equation for the Force   is mathematically given as

[tex]Fnet = F_{costheta} - F_{friction}[/tex]

Therefore

Fnet = Fcostheta - mu*((mg) - Fsintheta)

sin theta = mu*costheta

mu = tantheta

theta = tan^-1(mu)

theta = tan^-1(.400)

theta = 21.8 °

In conclusion, the angle above horizontal

theta = 21.8 °

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2. What would be the effect on your body if you did not have kidneys? Page
112
A. My body would not absorb nutrients.
B. Waste would collect in the blood and become toxic
C. I could not eat gluten
D. Saliva could not be produced

Answers

Answer:

b

Explanation:

the kidney eliminates waste from the blood hence no kidney will result in accumulation of waste


20. Free-Body Diagram You are sitting in the back seat of a
car going around a curve to the right. Sketch motion
and free-body diagrams to answer these questions:
a. What is the direction of your acceleration?
b. What is the direction of the net force on you?

Answers

Centripetal acceleration

#1

Direction towards centre

#2

Direction of force also towards centre

A bicycle wheel of radius 40. 0 cm and angular velocity of 10. 0 rad/s starts accelerating at 80. 0 rad/s2. What is the centripetal acceleration of the wheel at this time point?

Answers

The magnitude of the centripetal acceleration of the bicycle wheel is 40 m/s².

Centripetal acceleration of the wheel

The centripetal acceleration of the bicycle wheel is the inward or radial acceleration of the bicycle on the circular path.

The magnitude of the centripetal acceleration of the bicycle wheel is calculated as follows;

a = ω²r

where;

ω is angular speed

r is the radius of the circular path

a = (10)² x 0.4

a = 40 m/s²

Thus, the magnitude of the centripetal acceleration of the bicycle wheel is 40 m/s².

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The acceleration of a body travelling in a circular route is known as centripetal acceleration.  The centripetal acceleration of the wheel at this time point is 40 m/sec².

What is centripetal acceleration?

The acceleration of a body travelling in a circular route is known as centripetal acceleration. It is given by the formula,

[tex]a_c = \dfrac{v^2}{r} = \omega^2 r[/tex]

The centripetal acceleration of the wheel with angular velocity 10 rad/sec and velocity 40cm (0.4 m) can be written as,

[tex]a_c = \omega ^2\times r\\\\a_c = (10)^2\times 0.4\\\\a_c = 40\rm\ m/sec^2[/tex]

Hence, the centripetal acceleration of the wheel at this time point is 40 m/sec².

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Scientists observed a rocky, rotating object orbiting in space. It was 250 km wide. The rocky object was located several times farther away from the sun than the earth

Answers

The rocky object orbiting in space is most likely referred to as an asteroid.

What is an Asteroid?

This is referred to a rocky object which revolve around the sun and are considered too small to be called a planet.

Asteroids was observed with the use of a telescope and is around 250 km wide thereby making it the most appropriate choice.

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What causes changes in the orbit of objects in the solar system.

Answers

Orbits may change due to the gravitational effects from, or collisions with, other objects in the solar system.

Question 3
The FRC robot is rushing to pick up a game ball to shoot. The robot
is at rest and then it travels 30m in 1.96s. What is the robot's
acceleration in this time?

Answers

Answer:

15.61 m/s^2

Explanation:

From 3 rd equation of motion

s=ut+1/2at^2

given s = 30

u= 0 ( as body was at rest)

t= 1.96s

30=0*1.96+1/2a(1.96)^2

30=0+1/2a(1.96)^2

a=2*30÷(1.96)^2

a= 15.61 m/s^2 (approx)

How many stars are in a typical spiral galaxy, like our own?.

Answers

Answer:

200 billion to 400 billion stars in a typical spiral

Explanation:

hope this helps

have an awesome day -TJ

A laser beam is used to levitate a metal disk against the force of earth's gravity.
(a) derive an equation giving the required intensity of light, i, in terms of the mass m of the disk, the gravitational acceleration g, the speed of light c, and the cross-sectional area of the disk a. assume the disk is perfectly reflecting and the beam is directed perpendicular to the disk. (do not substitute numerical values; use variables only.)
i =
(b) if the disk has mass 3.89 g and radius 2.40 cm, find the necessary light intensity.
(c) give two reasons why using light pressure as propulsion near earth's surface is impractical.

Answers

The necessary light intensity of the disk if the disk has mass 3.89 g and radius 2.40 cm is 6.483 x 10^12cd.

Calculations and Parameters:

a. Given that:

i= intensity of light m= mass of disk g= gravitational acceleration c= speed of light a= cross-sectional area of the disk

I = P/A

= Force x Speed/Area

Gravitational force, F= GM1M2/r^2

F= ma, F= mg

I= mg x c/q

That is,

i= mass x gravitational acceleration x speed/area

b.

Mass= 3.89g

Radius, r= 2.40cm

i=?

i= mg x c/a

Speed of light= 3.0 x 10^8 m/s

Area, a= /pi r^2

= 3.142 x (0.024)^2

= 3.142 x 0.000576

= 0.0018m^2.

i= 3.89 x 10 x 3.0 x 10^8/0.0018

i= 6.483 x 10^12cd.

c. Light has no mass, therefore, it lacks momentum and cannot exert pressure for propulsion of materials.

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What increases the transfer of the wind's energy to the water?


Question 4 options:

A. flat water


B. large waves


C. large rocks

PLEAS HELP ME FAST

Answers

Answer:

A, flat water

Explanation:

Which planets are generally referred to as the ice giants?.

Answers

Answer:

The correct answer is Uranus and Neptune

why did united states withdraw from vietnam war

Answers

the Army had a fight in unfamiliar territory but with the combination of disadvantages and a loss of public support what to the United States withdrawing from Vietnam

Explanation:

I hope this helps

A ball that has a mechanical energy of 65 J haas 10 j of kinetic energy. The ball has j of potential energy

Answers

Answer:

55 j

Explanation:

Mechanical energy = kinetic + potential

                  65          = 10 + P.E.

                    55 j = PE

What is the difference between gravity and acceleration?

Answers

Aceleration refers to motion but gravity refers to force



Acceleration is change of velocity with time while gravity is the force of attraction pulling objects. When this force pulls an object it tends to move with a certain type of acceleration called acceleration due to gravity. This is equal to 9.8 m / s^2 for earth

Acceleration is the rate of change in velocity. While g is the acceleration due to gravity. The pace at which a body's velocity varies is represented by acceleration, which is a vector quantity.

What is acceleration?

The rate of change of velocity with respect to time is known as acceleration. According to Newton's second law, the eventual effect of all forces applied to a body is its acceleration.

[tex]\rm a = \frac{v-u}{t}[/tex]

u is the initial speed

v is the final speed

t is the time interval

a is the acceleration of the ball

Gravitation is a natural law by which all things with all matter are attracted towards one another.

g is the acceleration due to gravity. whose value is equal to 9.81 m/sec².The value of the gravitational acceleration varies according to the height and the planet.

The value of the gravitational acceleration on the earth is 9.81 m/sec².While the value of g at the moon is 1.6333 m/sec².

Hence acceleration is the rate of change of velocity. While g is the acceleration due to gravity.

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Write an expression for the coefficient of kinetic friction between the block and the horizontal surface. Your answer should be in terms of x, vB, and g (the acceleration due to gravity)

Answers

An expression for the coefficient of kinetic friction between the block and the horizontal surface is given as μk = Ff/mg.

What is coefficient of kinetic friction?

The coefficient of kinetic friction is the force of frcition between a moving object and the horizontal surface.

The expression for the coefficient of kinetic friction between the block and the horizontal surface is given as;

Ff = μkFₙ

Ff = μkmg

μk = Ff/mg

where;

μk is the coefficient of kinetic frictionFf is the kinetic frictional forcem is mass of the blockg is acceleration due to gravity

Thus, an expression for the coefficient of kinetic friction between the block and the horizontal surface is given as μk = Ff/mg.

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What is current of 12 ohm? help me pleasee
1. 0.25 A
2. 0.5 A
3. 1 A
4. 1.5 A
5. 2 A​

Answers

Answer:

the current of 12 ohm is 2A

A net constant force of 1500 n gives a toy rocket an acceleration of 2. 5 m/������ 2. What is the mass of the rocket?

Answers

Answer:

600Kg

Explanation:

Force= mass × acceleration

mass= 1500/2.5

600kg

The mass of the rocket will be 600 kg.In the International System of Units (SI), the kilogram is the unit of mass.

What is mass?

Mass is a numerical measure of inertia, which is a basic feature of all matter. It is, in effect, a body of matter's resistance to a change in speed or position caused by the application of a force.

In the International System of Units (SI), the kilogram is the unit of mass.

The given data in the problem is;

The net constant force is, F= 1500 N

The acceleration is,a=2. 5 m/s²

The mass of the rocket is,m=?

[tex]\rm F= mass \times acceleration \\\\ m = \frac{F}{a} \\\\ m= \frac{1500}{2.5}\\\\ m = 600 \ kg[/tex]

Hence the mass of the rocket will be 600 kg.

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What is the Atomic Mass / Weight for silver? *Round your answer to the nearest whole number

Answers

The atomic mass of silver is 108

Which of the following was correctly predicted by Einstein's theory of gravity?
(A) the origin of mass
(B) law of refraction
(C) the measure of G
(D) light deflected around large objects because of their gravity

Answers

Answer:

(D) light deflected around large objects because of their gravity

I hope this helps you

:)

Find the number of permutations when 7 objects are taken 1 at a time

Answers

Using the formula for  permutation, there are 5040 ways that  7 objects are taken 1 at a time.

What is permutation?

The permutation of objects refers to the number of ways that an object can be selected from a number of objects.

Given that;

nPr = n!/(n - r)!

Hence;

7P1 = 7!/(7 - 1)!

7P1 = 7 * 6 !/6!

7P1 = 7 * 6 * 5 * 4 * 3 * 2 *1

7P1 = 5040

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Two pistons are in an enclosed volume with fluid in between them, such that
movement in one piston affects the location of the other piston, as shown in
the image below. If an explosion occurs in the piston on the left such that it
moves 1 m, what is the distance that the piston on the right will move
(assuming that friction can be neglected)? (Recall that work on an object is
equal to the force on the object times the distance it is moved, and that work
is conserved.)
Cross-sectional area - 25 mm
Cross-sectional area = 0,5 m
A. 2 m
B. 0.5 m
C. 1 m
D. 0.25 m

Answers

Answer:

The pressure in the fluid just below Piston 1 is

p_1=F_1/A_1=361\text{ Pa}.p

1

=F

1

/A

1

=361 Pa.

The pressure in the fluid just below Piston 2 is the same according to Pascal's law:

p_2=p_1=361\text{ Pa}.p

2

=p

1

=361 Pa.

The force being exerted on Piston 2 to keep the two pistons in equilibrium is

F_2=p_2A_2=330\text{ N}.F

2

=p

2

A

2

=330 N.

Explanation:

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