Answer Happy

1. An object is dropped from a cliff that is 135 meters above ground level. resistance is negligible, the time that it takes the object to fall to the ground from the on is most nearly a. 5.0 s b. 5.25s c. 10 s d. 25.5 e. 27.5 s 2. An object is thrown with a horizontal velcity of 30 meters per second from a cliff that is 135 meters above level ground. Air resistance is negligble. The object lands a distance from the bottom of the cliff that is most nearly a. 150 m b. 157.5 m C. 300 m d. 475 m e. 520 m 3. A ceiling fan has blades 50 cm long. A spider is clinging to the tip of one of the blades, which are turning so that the spider moves at 10 m/s. What is the spider's radial acceleration? a. 2 m/s2 b. 50 m/s? C. 100 m/s2 d. 200 m/s2 e. 350 m/s2 4. A ball is thrown vertically upward and then comes back down. During the ball's flight up and down, its velocity and acceleration vectors are a. always in the opposite direction b. always in the same direction C. first in opposite direction and then in same directions d. first in same directions and then in the opposite direction e. none of the above