PHYS 211 Exam 3 review 1. A 4.00-kg block rests on a 30.0° incline as shown in the figure. If the coefficient of static friction between the block and the incline is 0.700, what magnitude horizontal force F must act on the 30.0° block to start it moving up the incline? ANS: 84 N 37° 37 0 2. Two ropes as shown in the figure support a traffic light weighing 100 N. Find The tensions in the ropes .Ans: 83N each. 3. A 200 g hockey puck is launched up a metal ramp that is inclined at a 30° angle. The coefficients of static and kinetic friction between the hockey puck and the metal ramp are u, = 0.40 and K = 0.30, respectively. The puck's initial speed is 63 m/s. What vertical height does the puck reach above its starting point? ANS 130 m 4. A wooden block A of mass 4.0 kg slides on a frictionless table when pulled using a massless string and pulley

PHYS 211 Exam 3 review 1. A 4.00-kg block rests on a 30.0° incline as shown in the figure. If the coefficient of static friction between the block and the incline is 0.700, what magnitude horizontal force F must act on the 30.0° block to start it moving up the incline? ANS: 84 N 37° 37 0 2. Two ropes as shown in the figure support a traffic light weighing 100 N. Find The tensions in the ropes .Ans: 83N each. 3. A 200 g hockey puck is launched up a metal ramp that is inclined at a 30° angle. The coefficients of static and kinetic friction between the hockey puck and the metal ramp are u, = 0.40 and K = 0.30, respectively. The puck's initial speed is 63 m/s. What vertical height does the puck reach above its starting point? ANS 130 m 4. A wooden block A of mass 4.0 kg slides on a frictionless table when pulled using a massless string and pulley

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter5: Newton's Law Of Motion

Section: Chapter Questions

Problem 23P: While sliding a couch across a floor, Andrea and Jennifer exert forces FA and FJ on the couch....

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While sliding a couch across a floor, Andrea and Jennifer exert forces FA and FJ on the couch. Andrea’s force is due north with a magnitude of 130.0 N and Jennifer’s force is 32 east of north with a magnitude of 180.0 N. (a) Find the net force in component form. (b) Find the magnitude and direction of the net force. (c) If Andrea and Jennifer’s housemates, David and Stephanie, disagree with the move and want to prevent its relocation, with what combined forceFDS should they push so that the couch does not move?
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