Physics, 19.02.2020 20:08 GreenHerbz206
Which of the following requires the expenditure of more work?(a) Lifting a 90newton [N] weight a height of 5meters [m].(b) Exerting a force of 60pounds-force [lb Subscript f]on a sofa to slide it 30feet [ft] across a room.
Answers: 1
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If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s
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Physics, 22.06.2019 16:50
During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.
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Elements on the periodic table are ordered according to their
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Which of the following requires the expenditure of more work?(a) Lifting a 90newton [N] weight a hei...
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