Question

3. Find the initial velocity of a car which is stopped in 10 seconds by applying brakes. The
retardation due to brakes is 2.5 m/s2.​

Answer 1

Answer:

25m/s

the answer is given above

Answer 2

Given in question that,

Time = 10 sec, Retardation = -2.5 m/s^2 and Final velocity = 0 m/s

Initial velocity = ?

v = u + at (First Equation Of Motion)

=> 0 = u + (-2.5)(10)

=> 0 = u - 25.0

=> -u = -25.0

=> u = 25 m/s