Physics, 04.03.2020 23:29 tristanmatthias3456
A heavy steel ball is hung from a cord to make a pendulum. The ball is pulled to the side so that the cord makes a 4 β angle with the vertical. Holding the ball in place takes a force of 20 N . If the ball is pulled farther to the side so that the cord makes a 8 β angle, what force is required to hold the ball? Express your answer to two significant figures and include the
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Occurs when an energy source transfers heat directly to another subject space; an example would be an object becoming warm by sitting in the sunshine
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Aball is thrown upward. at a height of 10 meters above the ground, the ball has a potential energy of 50 joules (with the potential energy equal to zero at ground level) and is moving upward with a kinetic energy of 50 joules. what is the maximum height h reached by the ball? consider air friction to be negligible. 1. h β 10 m 2. h β 50 m 3. h β 30 m 4. h β 40 m 5. h β 20 m 003 10.0 points which of the two object shown below has the greatest kinetic energy? a m b 1 2 m v 2v 1. kinetic energies are the same. 2. a 3. b 4. unable to determine. 004 10.0 points tim, with mass 74.6 kg, climbs a gymnasium rope a distance of 3.1 m. the acceleration of gravity is 9.8 m/s 2 . how much potential energy does tim gain? answer in units of j. 005 10.0 points a car is moving at 64 miles per hour. the kinetic energy of that car is 5 Γ 105 j. how much energy does the same car have when it moves at 111 miles per hour? answer in units of j. 006 10.0 points an 102 kg man climbs up a 1 m high flight of stairs. the acceleration of gravity is 9.81 m/s 2 . w
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A heavy steel ball is hung from a cord to make a pendulum. The ball is pulled to the side so that th...
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