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Phys298Exam2Sample2

# Phys298Exam2Sample2 - t = 0 and the time the particles...

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13. Particle 1 has mass 1 kg and position, starting at t = 0 , given by r r 1 = 5 t ) i + (10 + 10 t " 5 t 2 ) ) j m. Particle 2 has mass 3 kg and position, starting at t = 0 , given by r r 2 = 5 t ) i + 5 t ) j m. Time is given in seconds. a. At what time do the particles collide? b. Find the position of the center of mass as a function of time between t = 0 and the time the particles collide. c. Find the velocity of the center of mass as a function of time between t = 0 and the time the particles collide. d. What is the net external force on the system between
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Unformatted text preview: t = 0 and the time the particles collide? e. What is the total momentum of the system at the time of collision? 14. A block slides down a 45 degree incline and around a vertical loop-the-loop of radius R . The loop is frictionless, but the incline is not. If the block starts from a height of 4 R above the base of the loop and barely makes it through the loop-the-loop, what is the coefficient of friction between the incline and block?...
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