Question

Vilosity 5 m second break applied for 3 second

Answer 1

Answer:

Initial velocity u = 20 m/s

Deceleration produced by braking a = - 2 m/s²

Time for which brakes are applied t = 5 s

Velocity at the end of 5 s braking can be found using the relation; v = u + a t

v = 20 m/s - 2 m/s² × 5s = 20 m/s - 10 m/s = 10 m/s.

So after 5 s of braking the car shall have a velocity = 10 m/s.