Aball rolls horizontally off a table of height 0.6 m with a speed of 9 m/s. how long does it take the ball to reach the ground?
a. 0.067 s
b. 0.35 s
c. 1.2 s
d. 15 s

This is the substance(s) formed in a chemical reaction.

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great.d) about 10 times as great.

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?