# Physics

posted by .

A train with a mass 5x10^5 kg is moving with a speed 80km/hr. If the train stops in 2min...1)What is the acceleration of the train? 2) What is the braking force applied to the train?

• Physics -

1. Vo = 80km/h = 80000m/3600s=22.2 m/s.
V = Vo + a*t.
a=(V-Vo)/t = (0-22.2)/120s=-0.185 m/s^2.

2. F = m*a = 5*10^5 * (-0.185)=-92500 N.

## Respond to this Question

 First Name School Subject Your Answer

## Similar Questions

1. ### Math

Train A and train B leave station going in opposite directions. Train B leaves 1/2 later than train A. Train B travels 80km/h faster than Train A. In 2 hours the trains are 3200KMs apart. How fast is each train traveling.. thank you
2. ### physics

The electric motor of a model train accelerates the train from rest to 0.780 m/s in 33.0 ms. The total mass of the train is 510 g. Find the average power delivered to the train during its acceleration.
3. ### physics

The electric motor of a model train accelerates the train from rest to 0.700 m/s in 17.0 ms. The total mass of the train is 670 g. Find the average power delivered to the train during its acceleration.
4. ### Science

when you ride in a train that passes a train moving in the opposite direction, the other train appears to rush past you at a greater speed than if you were watching from a parked car at a crossing. how does the speed of your train …
5. ### physics

2. A freight train traveling with a velocity of 18.0 m/s to the south begins braking as it approaches the train yard. The train’s acceleration while braking is -0.33m/s2. What is the train’s speed after 23 seconds?
6. ### physics

The electric motor of a model train accelerates the train from rest to 0.680 m/s in 23.0 ms. The total mass of the train is 580 g. Find the average power delivered to the train during its acceleration.
7. ### physics

The electric motor of a model train accelerates the train from rest to 0.755 m/s in 19.5 ms. The total mass of the train is 875 g. Find the average power delivered to the train during the acceleration.
8. ### physics

A 10^4 kg train moving at 20m/s stops in a distance of 500m. Calculate the force applied by the train's braking system.
9. ### physics

In the design of a rapid transit system, it is necessary to balance the average speed of a train against the distance between station stops. The more stops there are, the slower the train's average speed. To get an idea of this problem, …
10. ### physics

In the design of a rapid transit system, it is necessary to balance the average speed of a train against the distance between station stops. The more stops there are, the slower the train's average speed. To get an idea of this problem, …

More Similar Questions