Wei drags a heavy piece of driftwood for 960 m along an irregular path. If Wei ends 770 m from where he starts, exerting

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Wei Drags A Heavy Piece Of Driftwood For 960 M Along An Irregular Path If Wei Ends 770 M From Where He Starts Exerting 1 (20.79 KiB) Viewed 35 times

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Wei Drags A Heavy Piece Of Driftwood For 960 M Along An Irregular Path If Wei Ends 770 M From Where He Starts Exerting 2 (25.04 KiB) Viewed 35 times

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Wei drags a heavy piece of driftwood for 960 m along an irregular path. If Wei ends 770 m from where he starts, exerting a constant force of 625 N parallel to his path the entire time, how much work does he do? W =
Jack and Jill, whose masses are identical, go up a 300-m hill to fetch a pail of water. Jack climbs a sheer rock face to reach the top, while Jill follows a meandering path 775 m long. What is the magnitude of the difference between the work Jack does against gravity and the work Jill does against gravity to get to the top? difference:
A pendulum is constructed by attaching a small metal ball to one end of a string of length L = 1.10 m that hangs from the ceiling, as shown in the figure. The ball is released when it is raised high enough for the string to make an angle of 0 25.0 with the vertical. With what speed is the ball moving at the bottom of its swing? D= m/s