1. An object weighing 50 kg was dropped from a height of 10 m. What was its momentum the instant it struck the ground? What was its K.E.? Neglect air resistance.
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- Two 465g blocks of wood are 2 m apart on a frictionless table. A 15g bullet is fired at 419 m/s toward the blocks. it passes all the way through the first block then embeds itself in the second block. The speed of the first book in merely afterwards is 7 m/s. What is the speed of the second block after the bullet stops in it? Answer to 3 sig figs.A 2kg ball is subjected to a 40 N upward force. Find the momentum of the ball after 5 s if it is initially at rest. Don’t forget gravity.A 3.000 kg ball is pitched with a kinetic energy of 20.00 Joules. Then the momentum of the ball is A. 7.500 kg m/s. B. 8.350 kg m/s. C. 9.450 kg m/s. D. 10.95 kg m/s. E 12.50 kg m's.
- If the momentum of an object is trippled, its kinetic energy will change by what factor? I think it changes 9 times? not sure.Consider the two pucks shown in the figure. As they move towards each other, the momentum of each puck is equal in magnitude and opposite in direction. Given that v; oreen = 12.0 m/s, and mblue is 25.0% greater than mareen, what are the final speeds of each puck (in m/s), if - the kinetic energy of the system is converted to internal energy? 30.0 30.0 Vgreen m/s V blue m/sA 120 kg man is standing in the middle of a skating rink holding a 2kg ball. He suddenly throws the ball eastward at 5 m/s. What is the magnitude of his momentum afterward? Assuming frictonless between his skateboots and the ice.
- 9) An object of mass 2 kg has a linear momentum of 6 kg. m /s. What is this objects Kinetic energy? z kg 6 kg m/s >A 3.000 kg ball is pitched with a kinetic energy of 20.00 Joules. Then the momentum of the ball is A. 7.500 kg m/s. B. 8.350 kg m/s. C. 9.450 kg m/s. D. 10.95 kg m/s. E 12.50 kg m's.A 3.000 kg ball is pitched with a kinetic energy of 20.00 Joules. Then the momentum of the ball is A. 7.500 kg m/s. B. 8.350 kg m/s. C. 9.450 kg m/s. D. 10.95 kg m/s. E 12.50 kg m's.
- 3. A 1.2 kg ball falls vertically from a certain height and just before hitting the ground it acquires a speed of 25 m / s. If the ball bounces with an initial speed of 10 m / s, what momentum acts on the ball during contact with the ground?There are two cars, A and B, that have initial momentum (26 kg.m/s) and (-11 kg.m/s), respectively. The final momentum of car A is (4 kg.m/s). The final momentum of car B (after collision) (in kg.m/s) is B. 11 .a 6. .b o 7 .C O 4 .d o 9. .e OThe conservation of energy equation used in the answer was: Conservation of momentum: m1v1 = m1vf1 + m2vf2I believe the conservation of energy equation is:m1v1 + m2v2 = m1vf1 + m2vf2Therefore the answer should be 1.17 m/s.Am I correct? Can someone check my work please