Physics, 28.10.2020 15:10 alonnachambon
FREE FALL ON THE MOON FREE FALL ON THE MOON 1. A boy on Earth jumps straight upward with an initial velocity of 4.9 m/s. a. How long does it take for him to reach maximum height? b. At maximum height, what is his velocity? c. At maximum height, what is his acceleration? Explain your answer.2. An astronaut jumps on the Moon with an initial velocity of 16 m/s upward. On the Moon, the free-fall acceleration is 1.6 m/s2. (Assume that downward is the positive direction.) a. How long does it take him to reach maximum height? b. What is the maximum height he reaches? c. If you drew a velocity-time graph for the motion of the astronaut, what would be the slope of the line? d. Are the vectors for acceleration and initial velocity pointed in the same or different directions? Explain your answer.
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Boxing gloves are padded to lessen the force of a blow. (a) calculate the force exerted by a boxing glove on an opponent’s face, if the glove and face compress 7.50 cm during a blow in which the 7.00-kg arm and glove are brought to rest from an initial speed of 10.0 m/s. (b) calculate the force exerted by an identical blow in the gory old days when no gloves were used and the knuckles and face would compress only 2.00 cm. (c) discuss the magnitude of the force with glove on. does it seem high enough to cause damage even though it is lower than the force with no glove?
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FREE FALL ON THE MOON FREE FALL ON THE MOON 1. A boy on Earth jumps straight upward with an initial...
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