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PSYCHO15rus [73]
3 years ago
13

A space explorer is moving through space far from any planet or star. He notices a large rock, taken as a specimen from an alien

planet, floating around the cabin of the ship. Should he push it gently, or should he kick it toward the storage compartment? Explain.
Physics
1 answer:
yaroslaw [1]3 years ago
3 0
He should push it gently.
This is because the forces of resistance this situation are minimal, so the rock will not slow as it would on Earth. Kicking the rock may result in it travelling too fast and hitting something else, causing damage. Moreover, the rock could start rebounding off of surfaces and create havoc. 
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a foul ball is hit into the stands at a baseball game. the ball rises to a height of 38 meters and is caught on its way down by
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The velocity of the ball when it was caught is 12.52 m/s.

<em>"Your question is not complete it seems to be missing the following, information"</em>,

find the velocity of the ball when it was caught.

The given parameters;

maximum height above the ground reached by the ball, H = 38 m

height above the ground where the ball was caught, h = 30 m

The height traveled by the ball when it was caught is calculated as follows;

y = H - h

y = 38 - 30 = 8 m

The velocity of the ball when it was caught is calculated as;

v_f^2 = v_0 + 2gh\\\\v_f^2 = 0 + (2\times 9.8 \times 8)\\\\v_f^2 = 156.8\\\\v_f = \sqrt{156.8} \\\\v_f = 12.52 \ m/s

Thus, the velocity of the ball when it was caught is 12.52 m/s.

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The mechanical energy is converted to potential energy while the kinetic energy is zero

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