5. This next step is going to take some skill and some careful observation. The wave speed is associated with the movement of crests and troughs along the medium. Faster waves will have crests that move from
the left side of the screen to the right side of the screen in less time; that is the crests move from left to right
faster. Set the animation to a low frequency (about 0.1 Hz) and observe the wave speed. It might help to put
your finger or a pen cap on a crest and follow move your finger (or pen cap) from left to right along with the
crest. Then repeat for a high frequency (about 1.0 Hz). Make the same observation of wave speed - the
speed of the crest moving from left to right across the screen. Does this ten-fold increase in frequency - from
about 0.1 Hz to about 1.0 Hz - have any noticeable and appreciable effect upon the wave speed? Explain
your answer and discuss your observations.

Aball is thrown upward. at a height of 10 meters above the ground, the ball has a potential energy of 50 joules (with the potential energy equal to zero at ground level) and is moving upward with a kinetic energy of 50 joules. what is the maximum height h reached by the ball? consider air friction to be negligible. 1. h ≈ 10 m 2. h ≈ 50 m 3. h ≈ 30 m 4. h ≈ 40 m 5. h ≈ 20 m 003 10.0 points which of the two object shown below has the greatest kinetic energy? a m b 1 2 m v 2v 1. kinetic energies are the same. 2. a 3. b 4. unable to determine. 004 10.0 points tim, with mass 74.6 kg, climbs a gymnasium rope a distance of 3.1 m. the acceleration of gravity is 9.8 m/s 2 . how much potential energy does tim gain? answer in units of j. 005 10.0 points a car is moving at 64 miles per hour. the kinetic energy of that car is 5 × 105 j. how much energy does the same car have when it moves at 111 miles per hour? answer in units of j. 006 10.0 points an 102 kg man climbs up a 1 m high flight of stairs. the acceleration of gravity is 9.81 m/s 2 . w