PLEASE HELP! A 2457 kg car moves with initial speed of 18 ms-?. It is stopped in 62 m by its brakes.
How much work is done by the brakes?

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

Imagine that the rightward current flows in the rod for a short time. as a result, what will the net charge on the right and left ends of the rod become? left end negative and right end positive left end negative and right end negative left end negative and right end nearly neutral left end nearly neutral and right end positive both ends nearly neutral

What is reflection, what is refraction, and what is diffraction. what some similarities or differences between the three.