Question

A car of mass 550 kg is moving with a speed of 5 m/s due to a balanced force of 15 N. What is the acceleration of the car?​

Answer 1

Given info : A car of mass 550 kg is moving with a speed of 5m/s due to a balanced force of 15 N.

To find : the acceleration of the car is ...

solution : we know, acceleration is the rate of change of the velocity with respect to time.

     here the car is moving with a speed of 5 m/s due to a balanced force of 15N. force doesn't change its speed, it just helps the car to continue its motion with speed of 5 m/s. so the acceleration of the car is zero.

  therefore the acceleration of the car is zero.

[note : balanced force itself explances that the acceleration of the car would be zero, because balanced force is the system of two identical forces which act just opposite to each other. ]