Question

A certain car can accelerate from 0 to 60 mph in 7.9 s. What is the car's average acceleration in mph/s?

Answer 1

a = 7.6\ mph/s

Step-by-step explanation:

Motion With Constant Acceleration

It's a type of motion in which the velocity of an object changes uniformly in time.

The equation that describes the change of velocities is:

`v_f=v_o+at`

Where:

a = acceleration

vo = initial speed

vf = final speed

t = time

Solving the equation [for a:

`\displaystyle a=(v_f-v_o)/(t)`

The car accelerates from vo=0 to vf=60 mph in t=7.9 s, thus the acceleration is:

`\displaystyle a=(60 \ mph-0)/(7.9)`

a = 7.6\ mph/s