Write the position-time equation of motion and sketch the corresponding position-time graph for an object that starts at a position of 4.0 m and moves forward at a speed of 2.5 m/s for 8.0 seconds

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?

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J. j. thomson’s experiment disproved the theory that an atom