Four different boxes of physics textbooks are on a table. The weight of each box is balanced by an upward force or normal force provided by the table. Each box (A–D) is subjected to different horizontal forces as shown in the free-body diagrams below.

What is the magnitude of the acceleration, in m/s2, of the box of books labeled D?

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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?

Aforce of 8,480 n is applied to a cart to accelerate it at a rate of 26.5 m/s2. what is the mass of the cart?