Aball thrown vertically upward reaches a maximum height of 30. meters above the surface of earth. at its maximum height, the speed of the ball is
a. 0.0 m/s
b. 3.1 m/s
c. 9.8 m/s
d. 24 m/s

Acar moves at 12m/s and coasts up a hill with a uniform acceleration of -1.6m/s2. how far has it traveled after 6.0s?

Two polarizers are oriented at 70∘∘ to one another. unpolarized light falls on them. what fraction of the light intensity is transmitted?

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?