# physic

posted by .

a motor of mass 800kg traveeling at 20m/s
is brought to rest by brakes in 100m calculate the average braking force required if the object moves in three second

• physic -

vf^2=vi^2+2acceleration*distance
but acceleration=force/mass

solve for force

## Similar Questions

1. ### Physics

A car of mass 1200kg starts from rest, accelerates uniformly to a speed of 4.0 meters per second in 2.0 seconds and continues moving at this constant speed in a horizontal straight line for an additional 10 seconds. the brakes are …
2. ### Physics

A motor car of mass 30kg,moving with a velocity of 10m/s. by the application of brakes,it was brought to rest at a distance of 25meters. Find the average force.
3. ### Science

A motor car of mass 800kg traveling at 20m/s brought to rest by break over 100m calculate the average breaking force required
4. ### physics

a bus is travelling on a horizontal road at a velocity of 126 km/h when the bus driver notices an object in the road. the brakes are applied and the bus is brought to rest over a distance of 150m. the frictional resistance is 2500n …
5. ### physics

A motor car of mass 800kg travelling at 20m/s is brought to rest by brake in 100m.calculate the average braking force required.in physics
6. ### physics

A motor car of mass 800kg travelling at 20m/s is brought to rest by brake in 100m.calculate the average braking force required.in physics
7. ### physics

a motor car of mass 800kg travelling at 20m/s is brought to rest by breakes in 100m.calculate the average breaking force required.in physics
8. ### physics

a car of mass 1000 kg moving at a speed of 20 m/s is brought to rest through a distance of 100 m by applying the brakes.a)calculate the accleration of the car.b) calculate the force by the brakes assuming that is constant and there …
9. ### physics

A motor car of mass 30kg,moving with a velocity of 10m/s. by the application of brakes,it was brought to rest at a distance of 25meters. Find the average force.
10. ### Physics

What will be the average braking force needed to bring a car of mass 800kg traveling 72km/hr to a stop at a distance of 100m

More Similar Questions