Question

A toy car is given a quick push so that it moves up an inclined ramp. After it is released, it moves up, reaches its highest point and moves back down again. Friction is so small it can be ignored. What net force acts on the car?
1. Net constant force up the ramp
2. Net decreasing force down the ramp
3. Net force of zero
4. Net decreasing force up the ramp
5. Net increasing force up the ramp
6. Net increasing force down the ramp
7. Net constant force down the ramp

Answer 1

Answer:

7. Net constant force down the ramp

Explanation:

After the car is released and starts moving up the ramp, the only force that is applied on the car is weight because of the gravity, we were told that the friction force is neglected. the force because of the weight is given by:

$F=m*g*sin(\theta)$

where θ is the angle of the ramp.

as you can see those values won't change, so the force remains constant down the ramp.