Exam4S06a

# Exam4S06a - 1 A block of mass mB = 1.20 kg is initially at...

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B 1. A block of mass m = 1.20 kg is initially at rest on a frictionless surface. The surface is horizontal for A a distance D = 2.40 m, then curves upward in a semi-circle of radius R = 1.60 m. A bullet of mass m = A1 x 0.08 kg, that is initially traveling horizontally with a speed of v = 30 m/s, becomes embedded in the block in a totally inelastic collision, and both masses move on together. B2 x a) Find v the speed of the block just after it has captured the bullet. 1.875 m/s b) How long does it take for the block to travel the distance D to the start of the upward curve? 1.28 s c) To what maximum angle è does the block slide up the curve before it stops (momentarily)? 27.4 0 d) How long does it take for the block to slide down from the maximum angle (where it stopped) to the bottom of the curve? (Hint: approximate the motion to that of a simple pendulum at small angles.) 0.635 s

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2. Fill in the blank with the most appropriate answer to the following questions. Use SI units. a) The graph shows the velocity as a function of time of a bouncing ball on a planet (other than Earth). The magnitude of the acceleration of gravity on this planet is: ___6.0 m/s ___. 2 AB C b) Three unequal masses m =2 m = m /2 are on a horizontal frictionless table. The masses are connected by strings of negligible mass. If mass C is pulled to the right by the force F , giving a tension in the string between masses B and C of T =16 N, then the magnitude of the pulling force is F =__37.3 N__.
2 (continued). Fill in the blank with the most appropriate answer to the following questions. Use SI units. c) A Bo-Yo (bowling-ball yo-yo) consists of a ball that can be treated as a solid sphere of radius R and mass M =3.20 kg, with an axle of radius r =2 R /3 and negligible mass. A light string is wrapped around the

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Exam4S06a - 1 A block of mass mB = 1.20 kg is initially at...

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