Question

A rock bounces down a mountain. When will its kinetic energy be greatest?

Answer 1

It would've been nice if we'd have the complete thing. Ok. The greatest KE would be at the foot of hill as all the potential energy due to gravity would become KE.

Answer 2

since the gravitational field is a conservative field, then total energy (kinetic + potential) is conserved. So, kinetic energy will be greatest, when the elevation of the rock, with respect to a reference level, is the smallest.

Answer 3

U know
Kinetic energy=.5mv^2

Answer 4

v=velocity

Answer 5

If v is highest then kinetic energy will b highest

Answer 6

I think v will b highest on the bottom of hill