Question

A Ford Mustang was at a stop sign. The driver then stepped on the gas pedal and within 6 seconds was travelling at 36 m/s. What was the rate of acceleration?
A. 36 m/s²
B. 216 m/s²
C. 10 m/s²
D. 6 m/s²

Answer 1

Answer:

D. 6 m/s²

Explanation:

Given parameters:

Initial velocity  = 36m/s

Final velocity  = 0m/s

Time taken = 6s

Unknown:

Acceleration of the car  = ?

Solution:

Acceleration is the rate of change of velocity with time;

 Mathematically;

     Acceleration   = $\frac{v - u}{t}$

v is the final velocity

u is the initial velocity

t is the time

 Acceleration  = $\frac{0 - 36}{6}$   = -6m/s

The acceleration of the car must have been 6m/s²