By applying brakes to the vehicle it accelerates or retards?

A car moving with a speed of 40 km/h be stopped by applying brakes after at least 2 m , if the same car is moving with a speed of 80km/h . What is the minimum stopping distance ?

Two trains are travelling at 88m/s and the other at 117.3m/s are headed towards one another along a straight level track when they are 10560m apart , both engineers simultaneously see the other train and apply their brakes . If the brake deceleration each train at the rate of 3m/s_2 , determine whether they are in collision .

What an accelerated charge radiates ?

A motor car of mass 200 kg is moving with a velocity of 72 km/hr. By the application of brakes it is brought to rest in a distance of 100m. What is the force applied ?

Vehicles are streamlined to reduce

Vehicles are streamlined to reduce

Two car travelling each other on a straight road at velocity 10m/s and 12m/s respectively . When they are 150 m apart , both drivers apply their brakes and each car decelerates at 2m/s^2 until it stops . How far apart will they be when they have both come to stop?

A person jumps from a chair. He gets accelerated towards the earth. Does the earth also accelerate towards him?

A body moves along a straight line with acceleration 3m/s^2 for 2 seconds and then with acceleration 4 m/s^2 for 3 seconds . What is the average acceleration