Question

An Indy 500 race car's velocity increases from 4.0 m/s to +36

Answer 1

Answer:

The average acceleration is $8\ m/s^2$

Explanation:

Uniform Acceleration

When an object varies its velocity at the same rate, the acceleration is constant.

The relation between the initial and final speeds is:

$v_f=v_o+a.t$

Where:

vf  = Final speed

vo = Initial speed

a   = Constant acceleration

t   = Elapsed time

The acceleration can be calculated by solving for a:

$\displaystyle a=\frac{v_f-v_o}{t}$

The Indy 500 race car increases its speed from vo=4 m/s to vf=36 m/s in t=4 s. Thus, the average acceleration is:

$\displaystyle a=\frac{36-4}{4}=8\ m/s^2$

The average acceleration is $8\ m/s^2$