a.0J b. 10 J c. 125 J d. 200 J 18. A bathroom scale spring compresses...
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a.0J b. 10 J c. 125 J d. 200 J 18. A bathroom scale spring compresses by 0.5 cm when a 100 kg person stands on it. What is the elastic constant of this spring? a. 50 N/m b. 200 N/m c, 2000 N/m d. 200,000 N/m 19. What is the elastic energy stored in the spring in the above question? a. 2.5 (J) b. 5 (J) c. 250 (J) 20. Power is a measure of d. 2,500 (J) a. rate of change of energy b. rate of change of momentum c. force d. work 21. What is the power, in Watts, supplied by a student of mass 50 kilograms who climbs a height 50 meters in 10seconds? a. 5 b. 50 c. 250 d. 2500 22. A railroad car of mass 15,000 kg moving at 10 m/s collides with a second car of mass 30,000 kg that is initially at rest. What is their velocity after collision if they get stuck? a. 0 m/s b. 3.3 m/s c. 5 m/s d. 10 m/s a.0J b. 10 J c. 125 J d. 200 J 18. A bathroom scale spring compresses by 0.5 cm when a 100 kg person stands on it. What is the elastic constant of this spring? a. 50 N/m b. 200 N/m c, 2000 N/m d. 200,000 N/m 19. What is the elastic energy stored in the spring in the above question? a. 2.5 (J) b. 5 (J) c. 250 (J) 20. Power is a measure of d. 2,500 (J) a. rate of change of energy b. rate of change of momentum c. force d. work 21. What is the power, in Watts, supplied by a student of mass 50 kilograms who climbs a height 50 meters in 10seconds? a. 5 b. 50 c. 250 d. 2500 22. A railroad car of mass 15,000 kg moving at 10 m/s collides with a second car of mass 30,000 kg that is initially at rest. What is their velocity after collision if they get stuck? a. 0 m/s b. 3.3 m/s c. 5 m/s d. 10 m/s
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