Physics, 27.06.2019 19:30, daemonacoster
Aheavy ball swings on a string in a circular arc of radius 2 m. the two highest points of the ball’s trajectory are q and q ′ ; at these points the string is ±24◦ from the vertical. point p is the lowest point of the ball’s trajectory where the string hangs vertically down. the acceleration of gravity is 9.8 m/s 2 . what is the ball’s speed at the point p? neglect air resistance and other frictional forces. answer in units of m/s what is the ball’s speed at the point q? 1. 0 m/s < kvq k < kvpk 2. kvqk < 0 m/s 3. kvqk = 0 m/s 4. kvqk > kvpk 5. kvqk = kvpk
Answers: 1
Physics, 21.06.2019 21:30, queenkimm26
Look at the potential energy diagram for a chemical reaction. which statement correctly describes the energy changes that occur in the forward reaction?
Answers: 1
Physics, 22.06.2019 08:30, bollipard1183
Brutus, the dog, is pulling a bone to the left with a force of 20 n. lassie, another dog, is pulling a bone to the right with a force of 18n. what is the net force? a. b. c.
Answers: 1
Physics, 23.06.2019 08:00, bakerj5203
Diego is trying to lift a piano to the second floor of his house. diego uses a pulley system and gives a big lift to the piano. the piano moves upward, then stops, and then it starts to fall to the ground. which list best describes the forces on the piano in the proper order? a. positive force, balanced force, negative force b. negative force, balanced force, positive force c. positive force, unbalanced force, negative force d. negative force, unbalanced force, positive force
Answers: 1
Aheavy ball swings on a string in a circular arc of radius 2 m. the two highest points of the ball’s...
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