Question

A car is moving with a constant velocity. What are the forces on the car? What is the net force on the car?

Answer #1

The forces on the car are as follows:

1.Thrust: it is force of the motor, it convert the chemical energy of the fuel in to mechanical energy

2.Friction: it is the the force of opposition it acts between the car and the ground.

3.Air resistance: it is also the force of opposition which is caused by the air

4.Weight: it is the force of gravity on the object.

5.Normal force: it is the force that the ground pushes back up with.

The net force on the car is zero (0). Since, a=0

Therefore, according to Newton's 2nd law of motion F=ma.where m is the mass of the body

F=0

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