A large crate is placed on the bed of a truck but is not tied down. As the truck accelerates forward, the crate slides across the bed until it hits the tailgate. Explain what causes this. If the driver slammed on the brakes, what could happen to the crate

Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects