Decreasing KE
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Rank these four objects according to the questions asked.
Object A: m= 5.0 kg v=4.0 m/s h=2.0 m
Object B: m= 10.0 kg v=2.0 m/s h=3.0 m
Object C: m= 1.0 kg v=5.0 m/s h=5.0 m
Object D: m= 5.0 kg v=2.0 m/s h=4.0 m
Decreasing KE
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- slapshot Vo Slapshot: A hockey puck is hit by a hockey stick. The approximately constant force is 69 N, which acts for a time of 0.11 s. What is the speed of the puck after the slapshot? (Standard hockey puck mass 160 grams, and radius 7.6 cm.) (in m/s) OA: 6.44 OB: 8.57 C: 11.40 OD: 15.16 OE: 20.16 OF: 26.82 OG: 35.67 OH: 47.44Ball #1 mass= 1.0 kg Ball #2 1 velocity = 1.7 m/s K 2 mass= 1.5 kg velocity = 0.0 m/s What is the velocity of Ball #1 after the collision? Give your answer in m/s to 2 significant figures (two decimal places in this case).A +2 m/s mA = 4 kg 0 -2 m/s D +2 m/s mp = 8 kg 0 -2 m/s 2 s 2 4 s B +2 m/s mg = 4 kg 0 4 s -2 m/s E +2 m/s = 8 kg mg = 0 -2 m/s 2 s 2 s 4 s 4 s C +2 m/s mc=4 kg 0 -2 m/s F +2 m/s mp = 8 kg 0 -2 m/s 2 s Shown in the figure are six velocity vs. time graphs for six objects that move along a straight, horizontal and frictionless path. A single external force, such as a hand, acts on each object. The masses of each of the objects are given next to their respective graph of motion. For the four second interval shown, rank the total work done on the objects by the external force from greatest positive to the greatest negative for cases A-F. 4 s