this is for frq practice (not a grade) . It is a short free-responce question. -y siCs T RQ EIIra FracticeName:Block A with mass m, rests on a horizontal tabletop, while block B with mass m, hangs from astring of negligible mass that passes over a pulley and attaches to block A, as shown above. Thepulley has negligible mass and rotates with negligible friction about its axle. The blocks are at restdue to friction between block A and the tabletop. The tension in the string while the blocks are at resthas magnitude T, and the coefficient of static friction between block A and the tabletop is u (mu).(a) A student claims the magnitude of the frictional force acting on block A must be equal toum g. Briefly explain why the student's claim is incorrect.(b) Block B is given a quick downward push so that block A begins accelerating across the tabletopand block B accelerates toward the floor. The tension in the string while the two-block systemaccelerates is T2. How does T2 compare to T1? Explain your reasoning.(c) After block B falls a distance , the blocks have speed v1. In a second trial, the pulley of negligiblemass is replaced with a different pulley whose mass is not negligible, and the process described inpart (b) is repeated. After block B again falls a distance d, the blocks have speed V2. In a clear,coherent, paragraph-length response, explain how V1 and V2 compare.

Limiting Friction: As block lies on table And when tension on string starts in creasing, Force of…

A В Block A with mass m, rests on a horizontal tabletop, while block B with mass m, hangs from a string of negligible mass that passes over a pulley and attaches to block A, as shown above. The pulley has negligible mass and rotates with negligible friction about its axle. The blocks are at rest due to friction between block A and the tabletop. The tension in the string while the blocks are at rest has magnitude T1, and the coefficient of static friction between block A and the tabletop is u (mu). (a) A student claims the magnitude of the frictional force acting on block A must be equal to pmg. Briefly explain why the student's claim is incorrect. (b) Block B is given a quick downward push so that block A begins accelerating across the tabletop and block B accelerates toward the floor. The tension in the string while the two-block system accelerates is T2. How does T2 compare to T1? Explain your reasoning. (c) After block B falls a distance, the blocks have speed V1. In a second trial, the pulley of negligible mass is replaced with a different pulley whose mass is not negligible, and the process described in part (b) is repeated. After block B again falls a distance d, the blocks have speed V2. In a clear, coherent, paragraph-length response, explain how V1 and V2 compare.

18th Edition

ISBN:9781938168277

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

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

Chapter12: Static Equilibrium And Elasticity

Section: Chapter Questions

Problem 37P: To get up on the roof, a person (mass 70.0 kg) places 6.00-m aluminum ladder (mass 10.0 kg) against...