Question

A race car starts from the rest and speeds up uniformly to the right until it reaches a maximum velocity of 63 / in 9. What is the acceleration of the car?

Answer 1

Explanation:

Solution

Given that,

Time t=10sec

Velocity v=12km/h=1812×5m/s

Now, the acceleration is

Using of equation of motion

 v=u+at

 12×185=0+a×10

 a=10×1812×5

 a=31m/s2

Hence, the acceleration is 31m/s2