Conclusion of harmonic filter in physics.

Using the given data table, calculate the acceleration of the skateboarder. you can use either form of the equation below?

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

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?