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8. A car and a truck collide. The momentum of the system of car and truck will be a) conserved if the collision is elastic. b) conserved if the collision is perfectly inelastic. c) perfectly conserved if the net internal force > net external force. d) approximately conserved if Frc = FcT >> |f + D|

8. A car and a truck collide. The momentum of the system of car and truck will be a) conserved if the collision is elastic. b) conserved if the collision is perfectly inelastic. c) perfectly conserved if the net internal force > net external force. d) approximately conserved if Frc = FcT >> |f + D|

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8. A car and a truck collide. The momentum of the system of car and truck will be a) conserved if the collision is elastic. b) conserved if the collision is perfectly inelastic. c) perfectly conserved if the net internal force >> net external force. d) approximately conserved if FrC = FcT >> |f + D %3D 9. A 2.00 kg object has a velocity of 2.00 m/s in the +x-direction. After the force shown below acts on the object, the object's new velocity equals F, (N) a) 1.67 m/s b) 2.50 m/s c) 2.33 m/s d) 3.17 m/s e) 4.20 m/s 2 t (s) -2 Impulse = area under curve 10. Which one of the following objects is in static equilibrium? А. В. С. D. а) А b) В с) С d) D e) None of the objects are in static equilibrium. 11. Rank the momenta shown in the figure below from largest to smallest 20 g 20 g a) 5>4 = 2 > 3 > 1 b) 1> 2> 3 > 4 > 5 c) 5>4> 3> 2 > 1 d) 1=2 >3 = 4 = 5 e) 2> 3 = 1 = 5 > 4 1 200 g 1 m/s 2 m/s 10 g 10 g 0.1 m/s 3 4 2 m/s 1 m/s
Transcribed Image Text:8. A car and a truck collide. The momentum of the system of car and truck will be a) conserved if the collision is elastic. b) conserved if the collision is perfectly inelastic. c) perfectly conserved if the net internal force >> net external force. d) approximately conserved if FrC = FcT >> |f + D %3D 9. A 2.00 kg object has a velocity of 2.00 m/s in the +x-direction. After the force shown below acts on the object, the object's new velocity equals F, (N) a) 1.67 m/s b) 2.50 m/s c) 2.33 m/s d) 3.17 m/s e) 4.20 m/s 2 t (s) -2 Impulse = area under curve 10. Which one of the following objects is in static equilibrium? А. В. С. D. а) А b) В с) С d) D e) None of the objects are in static equilibrium. 11. Rank the momenta shown in the figure below from largest to smallest 20 g 20 g a) 5>4 = 2 > 3 > 1 b) 1> 2> 3 > 4 > 5 c) 5>4> 3> 2 > 1 d) 1=2 >3 = 4 = 5 e) 2> 3 = 1 = 5 > 4 1 200 g 1 m/s 2 m/s 10 g 10 g 0.1 m/s 3 4 2 m/s 1 m/s
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