Question

calculate the initial velocity of a car moving with an acceleration of 2m\s sq in 5 sec comes to rest

Answer 1

Answer:

Initial velocity = 10 m/s

Explanation:

Given that,

Initial velocity = u = ?

Final velocity = v = 0 m/s

Acceleration (or deceleration in this question) = a = -2 m/s²

Time taken = t = 5s

From Newton's Law's of Motion,

v = u + at

Putting the values in we get,

0 = u - 2 × 5

0 = u - 10

u = 10 m/s