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BAED-PHYC2121 General Physics 1
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Find the tension in an elevator cable if the 1,500-kg elevator is descending with an acceleration of 2.8 m/s2, downward.
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Which of the following is not a vector quantity?
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An object, initially moving in the negative x-direction, is subjected to a change in velocity in the positive y-direction. If the resulting velocity vector is drawn from the origin, into which quadrant does this vector point?
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A 250-N sled is pulled up a 23° slope at a constant speed by a force of 200 N. What is the coefficient of kinetic friction between sled and slope?
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3.4 Free Fall
At the top of a cliff 100 m high, Raoul throws a rock upward with velocity 20.0 m/s. How much later should he drop a second rock from rest so both rocks arrive simultaneously at the bottom of the cliff?0%
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3.7 Parachutes, Air Drag, and Terminal Velocity
A cue ball of weight W is falling with acceleration g/2 downward and speed v. What would be the terminal velocity of this ball as it continues to fall?0%
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A ball is rolled horizontally off a table with an initial speed of 0.21 m/s. A stopwatch measures the ball's trajectory time from table to the floor to be 0.3 s. What is the height of the table? (g = 9.8 m/s2 and air resistance is negligible)
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The acceleration due to gravity on the Moon's surface is one-sixth that on Earth. An astronaut's life support backpack weighs 350 lb on Earth. What does it weigh on the Moon?
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A stone is thrown at an angle of 30° above the horizontal from the top edge of a cliff with an initial speed of 12.2 m/s. A stop watch measures the stone's trajectory time from top of cliff to bottom to be 5.8 s. What is the height of the cliff? (g = 9.8 m/s2 and air resistance is negligible)
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A fireman, 51.1 m away from a burning building, directs a stream of water from a fire hose at an angle of 33.2° above the horizontal. If the initial speed of the stream is 48.9 m/s, at what height will the stream of water strike the building?
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