1. At the start of his race, an 85-kg runner pushes against the starting block, exerting...
1. At the start of his race, an 85-kg runner pushes against the
starting block, exerting an average force of 1700 N . The force
that the block exerts on his foot points 20∘ above the
horizontal.
Determine the horizontal speed of the runner after the force is
exerted for 0.30 s .
Express your answer to two
significant figures and include the appropriate units.
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1. At the start of his race, an 85-kg runner pushes against the
starting block, exerting...
Constants A person pushes a 12.5 kg lawn mower at constant speed with a force of...
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At the start of a race, a four-man bobsled team pushes their sled as fast as they can along a 50 m flat starting stretch. The net force that the four men together apply to the 325 kg bobsled is 95.271 N directed at 15 degrees below the horizontal. As they push, 60 N of kinetic friction opposes them. What is the speed of the sled right before the team jumps on the sled?
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