A 165 kg boulder is perched on the edge of a cliff that is 27 m high. If the boulder falls over the edge of the cliff, what will be its velocity just before it hits the ground at the base of the cliff?

Which instrument is used to measure air temperature

How does the kinetic energy of a charge change as the charge moves under the effect of an electric field from higher potential to lower potential? a.the kinetic energy increases.b.the kinetic energy decreases.c.the kinetic energy remains the same.d.the kinetic energy is always zero.

What would be the result of an alpha particle coming into a magnetic field? a) the alpha particle will stop moving. b) the alpha particle will reverse its direction. c) the alpha particle will be deflected in a curve path. d) the alpha particle will continue to travel in a straight line.