Question

7. In a football game, the running back is running up the field. He starts from rest and runs for 3 seconds

with an acceleration of 2.5 m/s². What was the magnitude of his displacement?
a. 3.75 m
b. 11.25 m
C. 14.25 m
d. 22.5 m

Answer 1

11.25m

Step-by-step explanation:

Given parameters:

Initial velocity = 0m/s

Time of running = 3s

Acceleration = 2.5m/s²

Unknown:

Displacement = ?

Solution:

To solve this problem, we apply one of the motion equations.

S = ut +
`(1)/(2)` at²

u is the initial velocity

t is the time taken

a is the acceleration

S = (0 x 3) + (
`(1)/(2)` x 2.5 x 3²) = 11.25m