Forces contribute to the net force on a car rolling down a ramp?

forces contribute to the net force on a car rolling down a ramp.

a. which force supports the car’s weight?
b. which force accelerates the car down the ramp?
c. which force acts against the motion of the car?

Answers

1) Reaction

2) Gravitational force

3) Frictional force

Explanation

Reaction is directly opposite and equal to action(normal force). The normal force is the weight. So we can say that reaction supports the weight of the car.

Objects fall downwards due to acceleration due to gravity. The acceleration force is provided by the gravitational force. The car is accelerated downwards by the gravitational force.

Frictional force is the force that opposes relative motion between two bodies. When iar is involved, we call it viscosity. So the force that acts against the motion of the car is friction.