science
Easy

Question

# Vimal had a remote-control toy car, which had separate buttons to control its velocity and direction of motion. He wanted it to be under balanced forces. How should he use the remote for that?A) He should not start the car or use the remote.B) He should start the car and then keep on increasing its velocity uniformlyC) He should start the car and make it move in a circular pathD) He should start the car and fix its velocity at a certain value and fix its direction of motion.

Hint:

## The correct answer is: Only a and d are correct

### For balanced forces, Fnet=0. Means acceleration is also zero. If the velocity remains constant in magnitude and direction, there will be no acceleration and hence no net force. Forces are balanced. If the car is in rest position, there is no net force. Means the forces are balanced. So, the correct option is a.

• Centripetal acceleration is needed for circular motion. Means there will be net centripetal force also.
• Velocity is increasing means there is acceleration. And hence, there is net force.