06_InstSolManual_PDF

# 06_InstSolManual_PDF - CIRCULAR MOTION AND GRAVITATION 6...

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Figure 6.2 (b) gives 6.3. Set Up: Each hand travels in a circle of radius 0.750 m and has mass and weight 6.4 N. The period for each hand is Let be toward the center of the circular path. (a) The free-body diagram for one hand is given in Figure 6.3. is the force exerted on the hand by the wrist. This force has both horizontal and vertical components. Figure 6.3 (b) gives (c) The horizontal force from the wrist is 12 times the weight of the hand. Refect: The wrist must also exert a vertical force on the hand equal to its weight. 6.4. Set Up: Since the car travels in an arc of a circle, it has acceleration directed toward the center of the arc. The only horizontal force on the car is the static friction force exerted by the roadway. To calculate the minimum coefficient of friction that is required, set the static friction force equal to its maximum value, Friction is static friction because the car is not sliding in the radial direction. Solve: (a) The free-body diagram for the car is given in Figure 6.4. The diagram assumes the center of the curve is to the left of the car. Figure 6.4 y n mg x f s 5m s n a rad f s s n . a rad 5 v 2 / R , F w 5 77 N 6.4 N 5 12. F x 5 ma rad 5 1 0.65 kg 21 118 m / s 2 2 5 77 N g F x 5 ma x a rad 5 4 p 2 R T 2 5 4 p 2 1 0.750 m 2 1 0.50 s 2 2 5 118 m / s 2 w x y F F x F y a rad F S 1 x T 5 1 1.0 s 2 / 1 2.0 2 5 0.50 s. 1 0.0125 52 kg 2 5 0.65 kg v 5 Å TR m 5 Å 1 60.0 N 0.90 m 2 0.80 kg 5 8.22 m / s. T 5 m v 2 R . g F x 5 ma x y x mg T n a rad 6-2 Chapter 6
(b) gives gives and 6.5. Set Up: The person moves in a circle of radius The acceleration of the person is directed horizontally to the left in the f gure in the problem. The time for one revolution is the period Solve: (a) The free-body diagram is given in Figure 6.5. is the force applied to the seat by the rod.

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## This note was uploaded on 06/10/2010 for the course PHY 185363 taught by Professor R during the Summer '09 term at Florida College.

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06_InstSolManual_PDF - CIRCULAR MOTION AND GRAVITATION 6...

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