Question

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

Answer 1

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Answer 2

Give:

Initial Speed of car = 72 km/hr

Final Speed of Car = 0

To Find:

The acceleration of the car in m/s2

Solution:

Acceleration is the rate of change of the velocity of an object with respect to time.

The acceleration is given by the formula

acc = (Final Velocity - Initial Velocity)/ time

Initial velocity = 72km/hr = 20 m/s

= ( 0 - 20) / 25

= - 0.8 m/s^2

The acceleration is 0.8 m/s^2.