Decreases the input force
Answer:
Final velocity at the top of the ramp is 6.58m/s
Explanation
Check the attachment
Answer:

Explanation:
The problem is solved using the law of conservation of energy,
So




Are you sure you weren't given any options? Basically the electrical components, e.g wires and bulbs will be conductors, and the part comprising the outer casing, e.g plastic, glass, will be insulators
The answer is (A) hope it helps