Question

The velocity of a car changes from 10 m/s east to 30 m/s east in 4 seconds.

What is the acceleration of the car?
A. 5 m/s2 east
B. 10 m/s2 west
c. 10 m/s2 east
D. 5 m/s2 west

Answer 1

5m/s²

Step-by-step explanation:

Given parameters:

Initial velocity = 10m/s due east

Final velocity = 30m/s due east

Time = 4s

Unknown:

Acceleration of the car = ?

Solution:

Acceleration is the rate of change of velocity with time.

Mathematically;

Acceleration =
`(v - u)/(t)`

v is the final velocity

u is the initial velocity

t is the time taken

Insert the parameters and solve;

Acceleration =
`(30 - 10)/(4)` = 5m/s²