Questions about Collisions

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Dec 6, 2023

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Questions about Collisions/Momentum from Mock Exam 2 (UHScienceResources): 11. An 80.0kg truck is traveling north and runs a red light, colliding with a 20.0 kg car who is traveling east. Immediately after the collision, the truck and car are seen to be moving together at 2.50 m/s in a direction 60.0 degrees North of East. How fast was the car traveling before the collision? a)4.60 m/s b)3.00 m/s c)4.97 m/s d)6.81 m/s e)6.25 m/s 12. Initially traveling at 21.0 m/s, a600 kg tract or a 90.0 o turn. After the turn, its velocity is 24.0 m/s. What is the magnitude of the tractor’s resultant momentum? a)19.1 x 103kg*m/s b)10.2 x 103kg*m/s c)9.55 x 103kg*m/s d)12.0 x 103kg*m/s e)22.2 x 103kg*m/s 13. A glass bowl is dropped and breaks up into two fragments: one with a mass of 200 g traveling along the x-axis with a speed of 82.0 m/s, and the other with a mass of 300 g traveling along the y-axis with a speed of 45.0 m/s. What is the total momentum of the two fragments? a)361 kg*m/s at 56.3ofrom the x-axis b)93.5 kg*m/s at 28.8ofrom the x-axis c)21.2 kg*m/s at 39.5ofrom the x-axis d)361 kg*m/s at .983ofrom the x-axis e)21.2 kg*m/s at 56.3ofrom the x-axis
16. A billiard pool ball is hit and travels with a speed of 2.0 m/s. It collides inelastically with an identical, stationary ball. After the collision, the first ball is deflected by a counterclockwise angle of 28ofrom its original direction of travel, and the second ball moves in a direction that makes at 42oclockwise angle with the original direction of travel of the first ball. What fraction of the initial energy is lost in this collision? a).12 b).24 c).36 d).48 e).64 12. An 80.0 kg truck is traveling north and runs a red light, colliding with a 20.0 kg car who is traveling east. Immediately after the collision, the truck and car are seen to be moving together at 2.50 m/s in a direction 60.0 degrees North of East. How fast was the car traveling before the collision? a.) 6.92 m/s b.) 3.41 m/s c.) 6.25 m/s d.) 4.79 m/s e.) 2.77 m/s 13. A 90 kg deer traveling east at 10 m/s collides headfirst with a 120 kg deer that is traveling west at 4 m/s. After the collision, their horns lock and they are seen traveling together at some velocity. What is that velocity? a.) 2 m/s West b.) 2 m/s East c.) 4 m/s West d.) 4 m/s East e.) 3 m/s South 14. Initially, a 1.2 kg hockey puck is sliding in one direction at 6 m/s towards the goal. However, the goalie swats it back, causing it to reverse direction at 14 m/s. Calculate the magnitude of the change in momentum of the puck. a.) 24 kg m/s b.) 35 kg m/s c.) 12 kg m/s d.) 41 kg m/s e.) 70 kg m/s
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