Question 1 Not yet answered Marked out of A ball of mass 2.0 kg falls vertically...
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Question 1 Not yet answered Marked out of A ball of mass 2.0 kg falls vertically and hits the ground with speed 7.0 m/s as shown below: 1.00 Flag question 7.0 ms 10 | 30 3.0 ms (In the above diagram, ms* means m/s.) The ball leaves the ground with a vertical speed of 3.0 m/s. The magnitude of the change in momentum of the ball, correct to two significant figures, is Ns. Question 2 Not yet An empty freight car of mass m coasts along a track at 2.00 m/s until it couples to a stationary freight car of mass 2m. The final speed of the two freight cars immediately after the collision is answered Marked out of 1.00 Flag question A. 1.50 m/s B. 1.33 m/s C. 1.15 m/s D. 0.667 m/s 1.00 Flag question Question 3 Not yet answered Marked out of The graph below approximates the net force exerted westward on a 9.71 g bullet in the barrel of a hunting rifle after it is fired. Note that the time axis begins at 0.5 x 10-4 s. Force and Time for a Rifle Bullet Force in KN 10.0 9.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0.0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (x 10** s) Using the data from the graph, the impulse imparted to the bullet from the time 1 x 10-4 s to 13 x 10-4 s is A. 7.2 N s [W] B. 3.6 N s [W] C. 10.8 N s [W] D. 14.4 N s [W] Question 5 Not yet answered Marked out of Which of the following quantities are conserved in an inelastic collision in an isolated system of two objects? Linear momentum of system Kinetic energy of system 1.00 A. Yes Yes Flag question B. Yes No C. No Yes D. No No Question 1 Not yet answered Marked out of A ball of mass 2.0 kg falls vertically and hits the ground with speed 7.0 m/s as shown below: 1.00 Flag question 7.0 ms 10 | 30 3.0 ms (In the above diagram, ms* means m/s.) The ball leaves the ground with a vertical speed of 3.0 m/s. The magnitude of the change in momentum of the ball, correct to two significant figures, is Ns. Question 2 Not yet An empty freight car of mass m coasts along a track at 2.00 m/s until it couples to a stationary freight car of mass 2m. The final speed of the two freight cars immediately after the collision is answered Marked out of 1.00 Flag question A. 1.50 m/s B. 1.33 m/s C. 1.15 m/s D. 0.667 m/s 1.00 Flag question Question 3 Not yet answered Marked out of The graph below approximates the net force exerted westward on a 9.71 g bullet in the barrel of a hunting rifle after it is fired. Note that the time axis begins at 0.5 x 10-4 s. Force and Time for a Rifle Bullet Force in KN 10.0 9.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0.0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (x 10** s) Using the data from the graph, the impulse imparted to the bullet from the time 1 x 10-4 s to 13 x 10-4 s is A. 7.2 N s [W] B. 3.6 N s [W] C. 10.8 N s [W] D. 14.4 N s [W] Question 5 Not yet answered Marked out of Which of the following quantities are conserved in an inelastic collision in an isolated system of two objects? Linear momentum of system Kinetic energy of system 1.00 A. Yes Yes Flag question B. Yes No C. No Yes D. No No
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