What is a bearing, and where is it used?

What should wheel bearing seals be checked for?

A. Smoke

B. Color changes

C. Leaks

D. Gasoline

E. All of the above

The 2-lb brick slides down a smooth roof, such that when it is at A, it has a velocity of 5 ft/s. Determine the speed of the brick just before it leaves the surface at B, the distance d from the wall to where it strikes the ground, and the speed at which it hits the ground.

The position of a particle along a straight-line path is defined by
s=(
t
3
−6
t
2
−15t+7)
ft
, where
t
is in seconds.