Question

a car slows down from a speed of 72km/h to rest in 25 seconds. what is the acceleration of car in m/s2

Answer 1

Explanation:

72km/hr=20m/s

acceleration=20÷25 m/s2

=4/5 m/s2

Answer 2

Answer:

Explanation:

U=0

Vo=72

T=25

Vo=u+at

Where at is retarding so it should be negative

Vo=u-at

72=0-a25

a=72/25=-2.88

Approximately -3m/s^2