A body accelerates uniformly from rest at the rate of 3ms–² for 8s. Calculate the distance covered by the body during acceleration.

Practice Physics Past Questions & Answers on SPEED, VELOCITY AND ACCELERATION 

 Question 4: 

A body accelerates uniformly from rest at the rate of 3ms–² for 8s. Calculate the distance  covered by the body during acceleration.

Solution

Using appropriate symbols deduce, the known and unknown from the question. 

Acceleration, a = 3m/s²; initial velocity, u = 0; time, t = 8s; distance, s=?

Therefore the most appropriate equation that includes a, u, t and s is the second equation of motion:

s = ut + ½at²

Substituting:

s = 0x8 + ½ x 3 x 8² 

S = 0 + ½ x 3 x 64

S= 96 m