Question

A car starting with an initial velocity 40m/s comes to rest after 2 minutes
find out the retardation of a car​

Answer 1

Answer:

25m/s

Explanation:

Initial velocity, u=?

Final velocity, v=0m/s (car is stopped)

Acceleration, a=−2.5m/s

2 (negative because it is retardation)

Time, t=10s

Use the relation of the first equation of motion:

v=u+at

0=u+(−2.5)×10

u=25m/s