If a train is moving 10 m/s, how long would it take the train to go 2200 m

Answer:

13. (i) The magnitude of the force that is pressing the lawn-mower directly into the ground is 25 N

(ii) The magnitude of the effective force that moves the mower forward is approximately 43.3 N

(iii) Because there are no net downward force acting on the lawn-mower

Explanation:

13. The given force pushing the lawn-mower = 50 N

The angle at which the force acts = 30° to the ground

The component of the pushing force are;

(i) The magnitude of the force that is pressing the lawn-mower directly into the ground = The vertical component of the pushing force

The vertical component of the pushing force, [tex]F_y[/tex] = 50 N × sin(30°) = 25 N

∴ The magnitude of the force that is pressing the lawn-mower directly into the ground = [tex]F_y[/tex]  = 25 N

(ii) The magnitude of the effective force that moves the mower forward = The horizontal component of the pushing force

The horizontal component of the pushing force, Fₓ = 50 N × cos(30°) = 25·√3 N ≈ 43.3 N

∴ The magnitude of the effective force that moves the mower forward = 25·√3 N  ≈ 43.3 N

(iii) The lawn mower moves forward and not downwards because according to Newton's first Law of motion, the lawn-mower moves forward because it is being acted on by a net forward directed horizontal force

However, according to Newton's third law, the reaction of the ground is equal to the weight of the lawn mower, therefore, there are no net vertical force acting on the lawn-mower, such that the lawn-mower remains in the initial horizontal level and does not move downward into the ground.

Answer:

A is the correct answer

Hope it helps

I am 95 percent sure the answer in C

Answer: C

Explanation:

Answer:

I know I am super super late but it is C my guy :))

Explanation:

Have a nice day!!

Answer:

25,000,000 kg m/s

Explanation:

p: momentum (kg x m/s)

m: mass (kg)

V: velocity (m/s)

p= m * v

p= 3,000kg x 8,000 m/s

p= 25,000,000 kg m/s

Answer:

a= -1.2 m/s^2

Vi= 6.5 m/s

Vf= 0 m/s

t= 0-6.5/-1.2= 5.45 Sec

Explanation:

Answer:

B) Visible to all observers on the night time side of the earth

Explanation:

I hope this helps.

Answer:

answer is an ASTEROID

Explanation:

Iridium is a material that forms at very high temperatures, which is why its presence shows that in the impact zone the temperature rose a lot, so we can imagine that the impact was by a body traveling at high speed, which is consistent with a body that comes from space.

An asteroid is a celestial body of some size that when entering the atmosphere heats up and collides with the Earth, leaving a crater that in general is much larger than the diameter of the object.

A meteorite is a small fraction of an asteroid that has been separated by the pressure of the sun, the attraction of the Earth, Moon or another massive body or a combination of these effects, in general, meteorites are small and when they enter the atmosphere They are consumed by heat and very few reach the surface of the Earth, those that do reach are very small.

Therefore due to the size of the crater and the existence of many dead animals around the body must have been very heavy, so the correct answer is an ASTEROID

Answer:

B) An asteroid impact

Explanation:

Answer:

30 kg·[tex]\frac{m}{s}[/tex]

Explanation:

Impulse is equal to the average force multiplied by the elapsed time, or

J=[tex]F_{av}[/tex]Δt

Your average force [tex]F_{av}[/tex] is 50 newtons because it was a constant force. Your elapsed time Δt was 0.6 seconds.

Multiply these values and you get an impulse of 30 kg·[tex]\frac{m}{s}[/tex]

Answer:The fastest recorded human footspeed was recorded between 60 and 80m in Bolt's world record 9.58-second 100m final in Berlin in 2009. Bolt was clocked at 44.72km/h, which is 27.8mph. The Jamaican covered the distance between 60-80m in a time of just 1.61 seconds

Explanation:

pls brainlist too

Answer:

Over several years, Newton worked until he had developed the law of universal gravitation, which debuted in his book Mathematical Principles of Natural Philosophy (1869). This idea stood until the concepts of quantum theory and relativity were posed in the mid 19th century.

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Answer:

Storm surge is the additional water, above the normal tidal ocean water, caused by the wind and low pressure of a hurricane. It is added to whatever the tide happens to be when the storm hits. If the storm hits at high tide then it’s X feet above the high tide. Tides fluctuates based upon the time of the year and the cycle of the moon.

Explanation:

Answer:

Storm surge is the additional water, above the normal tidal ocean water, caused by the wind and low pressure of a hurricane. It is added to whatever the tide happens to be when the storm hits. If the storm hits at high tide then it’s X feet above the high tide. Tides fluctuates based upon the time of the year and the cycle of the moon.

Explanation:

Answer:

225J

Explanation:

1/2mvsq=1/2×50×9

Answer:

b. 225 J

Explanation:

Velocity (v) = 3 m/s

Mass (m) = 50 kg

[tex]K. E. = \frac{1}{2} m {v}^{2} \\ \\ = \frac{1}{2} \times 50 \times {3}^{2} \\ \\ = 25 \times 9 \\ \\ = 225 \: j [/tex]

Answer:

Q=it

Explanation:

[tex] \purple {\bold {Q = it}} [/tex] is the equation equation that links charge flow, current and time.

Here,

Q = Charge

i = current

t = time

Answer:

allah is pog

Explanation:

Answer:

combination

Explanation:

In the equation to make h20 they are both their; they combine to make h20 PLEASE AMRK BRAINLIEST I NEED IT ヾ(•ω•`)o

Answer:

400.7886829 rad/s

Explanation:

First we have to turn our 0.35 rev/s into rad/s using the equation

(Xrev/s)*2pi=Xrad/s we can plug in .35*2pi=.7pi rad/s

Now we can us the equation m_1*v_1*r_1^2=m_1*v_2*r_2^2 we can plug in the given. Because the mass remains the same we can cross it off of both sides giving us just: v_1*r_1^2=v_2*r_2^2

(.7pi)*(.54)^2=(v_2)*(.04)^2

(.20412pi)=(v_2)*(.0016)     [.20412pi=.6412618925]

then using division on both sides we get

(.6412618925/.0016)=v_2=400.79rad/s(This answer is rounded to the nearest hundreth)

See you in Mr.K's class tomorrow! -Ruben

The marble's angular speed as it passes through the neck of the funnel is 36.225 rev/s.

The conservation of angular momentum states that the angular momentum of an object is conserved when there is no external torque acting on it.

We have,

The marble is rolling in a large circular orbit around the rim of the funnel. The angular momentum of the marble can be expressed as:

L = Iω

where L is the angular momentum, I is the moment of inertia, and ω is the angular velocity.

Now,

Since the marble is rolling in a circular orbit around the rim of the funnel, we can approximate its moment of inertia as a point mass rotating around a fixed axis.

The moment of inertia of a point mass rotating around an axis is given by:

I = mr²

where m is the mass of the marble and r is the radius of the circular orbit.

At the top of the funnel,

The radius of the circular orbit is equal to the internal radius of the funnel,

r = 0.54 m.

At the bottom of the funnel,

The radius of the circular orbit is equal to the internal radius of the funnel's neck,

r = 0.040 m.

Now,

Using the conservation of angular momentum,

We can equate the angular momentum of the marble at the top of the funnel to the angular momentum of the marble at the bottom of the funnel.

[tex]I_1W_1 = 1_2W_2[/tex]

Substituting the expressions for the moment of inertia at the top and bottom of the funnel, and solving for [tex]W_2[/tex].

[tex]W_2[/tex] = [tex](I_1/I_2)[/tex][tex]W_1[/tex]

[tex]W_2[/tex] = (m[tex]r_1^2[/tex])/(m[tex]r_2^2[/tex]) [tex]W_1[/tex]

[tex]W_2[/tex] = (r1/r2)^2[tex]W_1[/tex]

[tex]W_2[/tex] = (0.54/0.040)²(0.35 rev/s)

[tex]W_2[/tex] = 36.225 rev/s

Therefore,

The marble's angular speed as it passes through the neck of the funnel is 36.225 rev/s.

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Answer:

31.404 seconds

Explanation:

To answer this equation, SUVAT is your best option utilizing and rearranging the known values to solve for the unknown.

here we have the values for

s=895

u=22

v=35

t= the unknown value

in this instant the equation s=0.5 x (u+v)t is the best equation to use

so we sub in the known values

895=0.5 x (22+35)t

rearrange to solve for t

895=28.5t

895/28.5=t

t=31.404 seconds (rounded to 3 decimal places)

Answer:

 fr = 7.84 N

Explanation:

To solve this exercise we must use Newton's second law, the case of translational equilibrium

          F -fr = 0

          F = fr

where F is the applied force and fr the friction force

for the Y axis

          N -W =

          N = W

          N = m g

the friction force has the equation

           fr = μ N

            fr = μ m g

in this case they indicate the two materials that are in contact with wood on wood, so when reviewing the tables the coefficient of static friction is μ=0.4

let's calculate

             fr = 0.4 2.0 9.8

             fr = 7.84 N

Answer:

Explanation:

it's blocked for me...it was unblocked but you know how everything else is blocked

Answer:

20 meters per second.

Explanation:

200/10

The correct option is (d).

Angle should be 180° between the direction of force and the direction of motion of a body as work done is equal to force multiplied by displacement multiplied by cosx.

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Answer:90+80+90=360

Explanation:10x+60–50

Answer:

a computer modeling

Explanation: