Question

A car has an i total speed of 7m/s.it's speed increases by 21m/s. It took 2.1 seconds for the speed to change. What is the acceleration

Answer 1

For this question we should apply

a = v^2 - u^2 by t

a = 21 - 7 by 2.1

a = 14 by 2.1

a = 6.66 m/s^2

.:. The acceleration is 6.66 m/s^2