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1584 Answer Key
Figure 4.26.
Using the free-body diagram:
, so that
.
25
1. Use Newton’s laws of motion.
Figure 4.26.
2. Given : , Find: .
3. so that .
. The force exerted by the high-jumper is actually
down on the ground, but is up from the ground and makes him jump.
4. This result is reasonable, since it is quite possible for a person to exert a force of the magnitude of .
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