Question

in the figure, potential energy is being converted into kinetic energy from
a point a to point b
b point b to point c
c the only energy involved here is kinetic
d energy is not being converted

Explanation:

Step1: Recall energy - conversion concept

Potential energy is related to height and kinetic energy to speed. As an object moves down - hill, its height decreases and speed increases.

Step2: Analyze the motion from A to B

From point A to point B, the car is moving down - hill. Its height is decreasing and speed is increasing. According to the conservation of mechanical energy (neglecting friction), potential energy is being converted into kinetic energy.

Step3: Analyze the motion from B to C

From point B to point C, the car is moving up - hill. Its height is increasing and speed is decreasing, so kinetic energy is being converted into potential energy.

Answer:

A. point A to point B