Jocko the clown at the top of a tall flagpole has considerable potential energy relative to the circus net below. After stepping off the pole and neglecting air resistance, his potential energy when he is half way to the net is
1) the same as at the top,
2) one quarter the amount at the top,
3) one half the amount at the top,
4) more than one-half the amount at the top,
and compared to his kinetic energy when meeting the net, his kinetic energy at the half-way point is
5) one half.
6) the same as his potential energy at the half-way point.
7) both of these
8) neither of these
Question 2
A golf ball moving forward with 1 unit of momentum strikes a heavy bowling ball that is initially at rest. After the golf ball bounces backward, the bowling ball is in motion with a momentum that must be
1) 1 unit.
2) more than 1 unit.
3) less than 1 unit.
The magnitude of the golf ball's momentum after collision must be somewhat less than 1 unit, for otherwise a violation would occur in the conservation of
4) energy.
5) momentum.
6) both.
7) neither.
Some energy interconversions in living organisms
Energy Chart
Activation energy of uncatalyzed and catalyzed chemical reactions
Energy Transfer Processes: Forced Convection
Energy in China
Fogel’s Map of a Potential Water Transport Network for 1890