Question

A car starts from rest and retains the acceleration of 4m/s² in 20 second . calculate its final velocity.

STEP BY STEP

Answer 1

Given : A car starts from rest and retains the acceleration of 4m/s² in 20 second. Calculate its final velocity.

Solution : As we know that a car starts from rest so it's initial velocity should be 0 m/s. Acceleration is 4 m/s² and time taken is 20 sec. So, we need to calculate it's final velocity which we can get it usi g the first equation of motion.

First Equation of Motion : v = u + at

Putting all the required values in the formula we will get v

• v = 0 + 4(20)

• v = 0 + 80

• v = 80

Henceforth, final velocity is 80 m/sec.