Author Question: A rock falls from a vertical cliff that is 4.0 m tall and experiences no significant air resistance ... (Read 152 times)

lracut11 · **on:** Jul 29, 2018

A rock falls from a vertical cliff that is 4.0 m tall and experiences no significant air resistance as it falls. At what speed will its gravitational potential energy (relative to the base of the cliff) be equal to its kinetic energy?

A) 3.1 m/s
B) 4.4 m/s
C) 6.3 m/s
D) 8.9 m/s
E) 13 m/s

Question 2

As more resistors are added in series to a constant voltage source, the power supplied by the source

A) increases.
B) decreases.
C) does not change.
D) increases for a time and then starts to decrease.