The additional force needed to bring the car into equilibrium is frictional force.
Answer:
Statement 1 and 3 are correct.
Explanation:
1. The mass moves downward, so the net acceleration of the block is straight downward.
2.The mass is sliding through the globe, so only the force of gravity is acting on the mass which pulls it in downward direction. The force of gravity has two components [mg sin∅] and [mg cos∅].
All of them are right except for the third one
Power is work over time.
We can solve for work by using F*d
Now solve for power: