Answer:
[tex]{ \boxed{ \bold{ \sf{Acceleration \: ( \: a) = 8 \: m/ {s \: }^{2} }}}}[/tex]
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♨ Question :
A car starts from rest and is moving at 60.0 m/s after 7.50 s. What is the car's average acceleration ?♨ [tex] \underbrace{ \sf{Required \: Answer : }}[/tex]
☄ Given :
Initial velocity ( u ) = 0 Final velocity ( v ) = 60.0 m/sTime ( t ) = 7.50 s☄ To find :
Acceleration ( a )✒ We know ,
[tex] \boxed{ \underline{ \bold{ \sf{Acceleration \: ( \: a) = \frac{Final velocity ( v ) - Initial velocity ( u)}{t} }}}}[/tex]
Substitute the values and solve for a.
➛ [tex] \sf{a = \frac{60.0 - 0}{7.50}} [/tex]
➛ [tex] \sf{a = \frac{60.0}{7.50}} [/tex]
➛ [tex] \boxed{ \boxed{ \sf{a = 8 \: m/ {s \: }^{2} }}}[/tex]
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✑ Additional Info :
When a certain object comes in motion from rest , in the case , initial velocity ( u ) = 0When a moving object comes in rest , in the case , final velocity ( v ) = 0If the object is moving with uniform velocity , in the case , u = v.If any object is thrown vertically upwards in the case , a = -gWhen an object is falling from certain height , in the case , final velocity at maximum height ( v ) = 0.Hope I helped!
Have a wonderful time ツ
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5. Why did people change the Bronx River in the past?
when a glacier came through the Bronx approximately 240,000 years ago it blocked part of the original path of the Bronx river and subsequently reshaped and modified the path of the river over the past 200 years the rivers course has been altered dramatically by human impact and industry.
have a great day ☺
Consider a compact car that is being driven
at 98 km/h.
The acceleration of gravity is 9.8 m/s2.
From what height would the car have to be
dropped to have the same kinetic energy?
Answer in units of m.
Answer:
Height h = 37.8 m
Explanation:
Given :
Velocity of car (v) = 98 km / h
Acceleration of gravity = 9.8 m/s²
Computation:
Acceleration of gravity = 9.8 m/s²
Acceleration of gravity = (98)(1,000 m / 3,600 s)
Acceleration of gravity = 27.22 m/s
By using law of conservation of energy ;
(1/2)mv² = mgh
h = v² / 2g
h = 27.22² / 2(9.8)
Height h = 37.8 m
The height from which the car would have to be dropped to have the same kinetic energy is 37.81 meters.
Given the following data:
Velocity = 98 km/h.Acceleration of gravity = 9.8 [tex]m/s^2[/tex]To find the height from which the car would have to be dropped to have the same kinetic energy:
First of all, we would convert the value of velocity in km/h to m/s.
Conversion:
[tex]98 = \frac{98}{3600} \times 1000 = 27.22 \;m/s[/tex]
Applying the law of conservation of energy:
[tex]P.E = K.E\\\\mgh = \frac{1}{2} mv^2\\\\gh = \frac{1}{2}v^2\\\\h= \frac{v^2}{2g}[/tex]
Substituting the given parameters into the formula, we have;
[tex]h = \frac{27.22^2}{2\times 9.8} \\\\h=\frac{741.05}{19.6}[/tex]
Height, h = 37.81 meters
Read more: https://brainly.com/question/23153766
A motorcyclist travelling at 30m/s starts to apply his brake when he is 50m from the traffic light that has just turned red .if he reached the traffic light. what is the deceleration
a
Answer:
9m/s²
Explanation:
Given parameters:
Initial velocity = 30m/s
Final velocity = 0m/s
Distance traveled = 50m
Unknown:
Deceleration = ?
Solution:
To solve this problem, we apply the proper motion equation;
V² = U² + 2aS
V is the final velocity
U is the initial velocity
a is the acceleration
S is the distance
Insert the parameters and solve;
0² = 30² + 2(a)50
-900 = 100a
a = -9m/s²
The negative value indicates deceleration.
The motorcycle decelerates at a rate of 9m/s²
what is 40% of 230 i need to know soon plz im only 7
Answer:it's 92 my friend
Explanation:
have a great day
Answer:
92
Explanation:
0.4 · 230 = 92
How much does the earth weigh??
Which fluid is more dense, water or air?
(Yes, I know that air isn't a fluid, but it's the actual question made by my teacher lol)
Answer:
water
Explanation:
water is 1000 kg/m3 while air is 1.225 kg/m3
The force exerted by a moving 100 kg object is 1,000 newtons. What is the acceleration of the object?
Answer:
10 m/s²
Explanation:
Force is the product of mass of an object and its acceleration
The formula is : F= m*a -----where m is mass and a is acceleration
Use the values given in the equation as;
F= m*a
1000 = 100 * a
1000/100 = a
10 = a
10 m/s² = a
After carrying out a scientific investigation, Dr. Jones thinks she has just discovered new information about gravity. How should she best communicate her findings with other scientists? *
Post her discovery on the internet as fact.
Try to find new information on another topic.
Publish her discovery for other scientists to test.
Call her friends and tell them about the discovery
Answer:
Publish her discovery for other scientists to test.
Explanation:
In the context, Dr. Jones, a famous scientist conducted some experiment and has been working hard on it. She recently discovered some new information and facts about gravitation.
Now the best way to communicate and show her new discovery and results on gravity with the other scientist is to publish her findings in a famous science journal so that other scientist can work on it and make some test to find the same results.
By doing this, other scientist can work on her idea and she can tell and communicate her discovery with the other scientist and physicists.
A jet’s original velocity is 600 m/s. After 20 seconds accelerating at 8 m/s 2 , how
fast is it going?
Answer:
760 m/sExplanation:
The jet's speed or final velocity can be found by using the formula
v = u + atwhere
v is the final velocity
u is the initial velocity
t is the time taken
a is the acceleration
From the question we have
v = 600 + 20(8)
= 600 + 160
We have the final answer as
760 m/sHope this helps you
Which item is needed for clouds to develop?
Snow
Grass
Rain
Dust in the Air
(will mark brainliest)
Answer:
snow or rain
Explanation:
i know it has to be some kind of water , but I just don't know which one sadly . hope this helped :) !
Answer:
dust . i did this
Explanation:
When a substance is heated it can..... (Select all that apply)
a) Change from solid to liquid
b) get warmer
c) get colder
d) change from a gas to liquid
At 4 seconds after starting, a cyclist is traveling 10 m/sec. At 6 seconds, he is traveling 20 m/sec. What is his average acceleration from 4 seconds to 6 seconds?
Answer:
The average acceleration of the cyclist is 5 m/s²
Explanation:
Given;
initial velocity of the cyclist, u = 10 m/s
final velocity of the cyclist, v = 20 m/s
initial time of the cyclist, t₁ = 4 seconds
final time of the cyclist, t₂ = 6 seconds
The average acceleration is given by;
[tex]a = \frac{dv}{dt}\\\\a = \frac{v-u}{t_2-t_1}\\\\a = \frac{20-10}{6-4}\\\\a = 5 \ m/s^2[/tex]
Therefore, the average acceleration of the cyclist is 5 m/s²
How much force is required to move a 100kg cart with an acceleration of 2 m/s2?
Answer:
2000 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 1000 × 2
We have the final answer as
2000 NHope this helps you
The acceleration of a particle is given as a = kt2. Where k is a constant coefficient and t is time in seconds. At time t = 0, x = 24 m; At t = 6 seconds, it is x = 96 m and V = 18 m / s. Obtain the path (x) and velocity (V) equations depending on time.
Answer:
s = t⁴/108+6t+24
v = t³/27 + 6
Explanation:
Given the equation of acceleration expressed as a = kt²
t is in seconds
To get the velocity, we will integrate the acceleration function
a = kt²
Integrate both sides
a = kt²
v = ∫kt² dt
v = k ∫t² dt
v = kt³/3 + C1..... *
s = ∫kt³/3 dt+ ∫C1 dt
s = kt⁴/12+C1t + C2
At t = 0, S= 24
24 = k(0)⁴/12 + C1(0)+ C2
24 = C2
s = kt⁴/12+C1t + 24
If at t = 6 seconds, s = 96m
Substitute;
96 = k6⁴/12+6C1+ 24 .... **
Also at t = 6, v = 18m/s
Substitute into *
v = kt³/3 + C1..
18 = k6³/3 + C1..... ***
Solve ** and *** simultaneously and get k and C1
96 = k6⁴/12+6C1+ 24
k6⁴/12+6C1+ = 72 × 1
k6³/3 + C1 = 18 × 6
---------------------------
k6⁴/12+6C1+ = 72
k6⁴/3 + 6C1 = 108
Subtract
[(6⁴k)-4(6⁴k)]/12 = 72-108
-3(6⁴k)/12 = -36
6⁴k/12 = 12
6⁴k = 144
k = 144/1296
k = 1/9
Substitute k = 1/6 into k6³/3 + C1 = 18 and get C1
1/6(216/3) + C1 = 18
12+ C1= 18
C1 = 18-12
C1 = 6
Write s in terms of t;
s = kt⁴/12+C1t + 24
s = 1/9t⁴/12+6t+24
s = t⁴/108 + 6t + 24
Write v in terms of t;
v = kt³/3 + C1
v = 1/9(t³/3)+6
v = t³/27 + 6
When a substance is heated it can..... (Select all that apply)
a) Change from solid to liquid
b) get warmer
c) get colder
d) chafe form has to liquid
Fun Fact:
One time a professional UFC player tried to fight a 2 year old Grizzly Bear and lost the fight, and lost an Arm
Answer:
Haha
Explanation:
Which object most likely has magnetic domains like those shown in the image? A. A piece of wood near a magnet
B. A steel paper clip near a magnet
C. A piece of wood, not near a magnet
D. A steel paper clip, not near a magnet
Answer:
b. A steel paper clip near a magnet
Explanation:
A steel paper clip near a magnet is an object that most likely has magnetic domains because of its inner composition.
What is magnetic domain?A magnetic domain is a part or region within a magnetic substance in which the magnetization is present in a uniform direction.
So we can conclude that a steel paper clip near a magnet is an object that most likely has magnetic domains because of its inner composition.
Learn more about magnet here: https://brainly.com/question/14997726
Mr. Palmer's dog is running at you at a a speed of 3.8 m/s. She has a KE of 231.04 J. How massive is Mr. Palmer's dog?
answer
Answer:
32kg
Explanation:
Given parameters:
Speed of the dog = 3.8m/s
Kinetic energy = 231.04J
Unknown:
Mass of Mr.Plamer's dog = ?
Solution:
Kinetic energy is the energy due to the motion of a body;
Mathematically, it is represented as;
K.E = [tex]\frac{1}{2}[/tex] m v²
m is the mass
v is the velocity
Insert the parameters and solve;
231.04 = [tex]\frac{1}{2}[/tex] x m x 3.8²
231.04 x 2 = 2 x [tex]\frac{1}{2}[/tex] x m x 3.8²
462.08 = 14.44m
m = 32kg
Help I need it please
4. A small rocket with a mass of 2000 g (hint: grams) accelerates at 8.3 m/s/s as it launches into the sky. How much force is acting on the rocket?
Answer:
16.6N
Explanation:
Given parameters:
Mass of rocket = 2000g = 2kg
Acceleration = 8.3m/s²
Unknown:
Force acting on the rocket = ?
Solution:
The force acting on a body can be derived from the product of its mass and acceleration;
Force = mass x acceleration
Insert the parameters and solve;
Force = 2 x 8.3 = 16.6N
Answer the following questions
Answer:
answer below
Explanation:
2: net force
3: balanced force
4: unbalnced force
i hope this is right
A book is being pushed to the right across a desk with a constant acceleration.
What is the force?
Explanation:
The force would be net positive.
Se sumerge en agua un cubo de un material que tiene una densidad de 0,2Kg/lt, y una
Arista de 9cm. Calcula: La parte del cubo que flota y la parte que se hunde.
a. 18% y 21%
b. 20% y 25%
c. 20% y 26.8%
d. 25% y 31%
Answer:
The percentage of the cube that floats = 80%
The percentage of the cube that sinks =20%
Explanation:
Given that the density of the cube material, [tex]\rho= 0.2 kg/l[/tex]
Length of the sides of the cube, [tex]a= 9 cm[/tex]
So, the volume of the cube, [tex]v=a^3=(9cm)^3=729 cm^3[/tex]
As [tex]1000cm^3= 1 l,[/tex]
so the volume of the cube [tex]v= 729/1000 l = 0.729 l.[/tex]
Hence, the mass of the cube, [tex]m=\fho v = 0.2 \times 0.729 = 0.1458 kg[/tex].
The gravitational force acting on the cube in the downward direction,
[tex]F_c= mg[/tex] [g is the acceleration due to gravity]
[tex]\Rightarrow F_g=0.1458g[/tex] Newtons ...(i)
At equilibrium condition, let x cm of the cube sinks in the water.
So, the volume of the water replaces,
[tex]v_w=9\times 9\times x = 81x cm^3.[/tex]
Or, [tex]v_w= 81 x/ 1000 l = 0.081x l[/tex]
The density of the water, [tex]\rho_w= 1 kg/l[/tex]
So, the mass of water replaced,
[tex]m_w= \rho_w v_w = 1\times 0.081x= 0.081x kg.[/tex]
Now, the buoyancy force acting on the cube in the upward direction,
[tex]F_b = m_w \times g[/tex] [ g is the acceleration due to gravity]
[tex]\Rightarrow F_b= 0.081x\times g[/tex] Newtons ...(ii)
At equilibrium condition, the gravitational force acting on the cube in the downward direction is equal to the buoyancy force acting on the cube in the upward direction, so by from equations (i) and (ii), we have,
[tex]F_g= F_b\\\\\Rightarrow 0.1458g = 0.081x\times g \\\\\Rightarrow 0.081x=0.1458 \\\\\Rightarrow x= 0.1458/0.081 = 1.8 cm[/tex].
So, the part of the cube that sinks = 1.8 cm
As the remaining portion of the cube is floating, so the part of the cube that floats [tex]= 9-1.8= 7.2 cm[/tex].
The percentage of the cube that floats
= [tex]\frac {7.2}{9}\times 100 = 80\%[/tex]
The percentage of the cube that sinks
[tex]= \frac {1.8}{9}\times 100 = 20\%[/tex]
Please note that none of the given options are correct.
Question 19 of 20
8 44%
Look at the diagram. To overcome the friction force, the man could use a slippery
substance like oil or graphite spray on the floor. These substances are examples of
what?
Enter your answer
Answer:
Dry luricants
Despite being in a solid phase they are able to reduce friction
I’m not sure because I’ve shave the learnt about much of this sorry
Amy is driving her 2400 kg car down the road, and the car produces a force of 7200 N. How fast is Amy accelerating?
Answer:
The acceleration of Amy's car is 3 m/s²
Explanation:
Given;
mass of Amy's car, m = 2400 kg
force of the car, F = 7200 N
According to Newton's second law of motion, the force of the car is given as;
F = ma
where;
a is the acceleration of the car
Substitute the given parameters and solve for acceleration;
a = F / m
a = (7200) / (2400)
a = 3 m/s²
Therefore, the acceleration of Amy's car is 3 m/s²
What is the magnitude of the velocity after it hits the ground?
Answer:
Multiply the time by the acceleration due to gravity to find the velocity when the object hits the ground. If it takes 9.9 seconds for the object to hit the ground, its velocity is (1.01 s)*(9.8 m/s^2), or 9.9 m/s.
Explanation:
A car sets off from traffic lights. It reaches a speed
of 27 m/s in 18 s. What is its acceleration?
1. to
Answer:
1.5 m/s^2
Explanation:
a = velocity/time
27/18 = 1.5 m/s^2
A 244.0 N block is at rest on a flat, frictionless table. A hooked cable applies an upward force of 24.0 N on the block. What is the normal force acting on the block?
Answer:
268N
Explanation:
The upward force acting on the block are the reaction and the hooked table..
The total normal force acting = normal reaction + 24N
Note that the normal reaction is always equal the weight of the table
Hence the normal force acting in the block is 244.0+24 = 268.0N
compare and contrast linear relationship and nonlinear relationship
Explanation:
The graph of a linear equation forms a straight line, whereas the graph for a non-linear relationship is curved. ... A non-linear relationship reflects that each unit change in the x variable will not always bring about the same change in the y variable
A net force of 124.0 N is applied to a certain object. As a result, the object's acceleration is 71.0 m/s/s. What is the mass of the object?
Answer:
[tex] \huge{ \boxed{ \sf{1.74 \: kg}}}[/tex]
☯ Question :
A net force of 124.0 N is applied to a certain object. As a result , the object's acceleration is 71.0 m/s/s ( m/s ² ). What is the mass of the object ?☯ [tex] \underbrace{ \sf{Required \: Answer: }}[/tex]
☥ Given :
Net force = 124.0 NAcceleration = 71.0 m/s☥ To find :
Mass of an object✎ We know :
[tex] \boxed{ \sf{net \: force = mass \: \times \: acceleration}}[/tex]
Substitute all the values and solve for m
➛ [tex] \sf{124.0 = mass \times 71.0}[/tex]
➛ [tex] \sf{71.0 \: mass = 124.0}[/tex]
➛ [tex] \sf{ \frac{71.0 \: mass}{71.0} = \frac{124.0}{71.0}} [/tex]
➛ [tex] \sf{mass = 1.74 \: kg}[/tex]
Hope I helped!
Have a wonderful time ツ
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