A race car can move from rest and its speed reaches 20m/sec through 5 sec. calculate the acceleration of the car. and mention the body moves by Accelerating motion – deceleration motion.

The rate of change of speed of a moving object is called.......................... and when the moving object moves with a regular speed ,its acceleration will =...............

A train moves by a velocity 20m/sec through 10 sec , if the brakes were applied to stop the train find the acceleration.and mention the train moves by (Accelerating motion – deceleration motion).