#### System of Particles and Rotational Motion Questions And Answers.

 1. A gun fires a bullet of mass 50g with a velocity of 30m/s. Because of this, the gun is pushed back with a velocity of 1m/s. The mass of the gun is? A. 5.5kg B. 3.5kg C. 1.5kg D. 0.5kg

 2. A body of mass 5kg is raised vertically to a eight of 10m by a force of 170N. The velocity of the body at this height will be? A. 37m/s B. 22m/s C. 15m/s D. 9.8m/s

 3. A position dependent force, F = 7-2x+3x2-N acts on a small body of mass 2kg and displaces it from x = 0 to x = 5m. The work done in joules is A. 135 B. 270 C. 35 D. 70

 4. A particle of mass M is moving in a horizontal circle of radius R with uniform speed v. When it moves from one point to a diametrically opposite point, its? A. Kinetic energy changes by (Mv)2/4 B. Momentum does not change C. Momentum changes by 2Mv D. Kinetic energy changes by (Mv)2

 5. Two identical balls A and B collide head on elastically. If velocities of A and B, before the collision are +0.5m/s and -0.3m/s respectively, then the velocities after the collision, are? A. -0.5m/s and +0.3m/s B. +0.5m/s and +0.3m/s C. +0.3m/s and -0.5m/s D. -0.3m/s and +0.5m/s

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