Answered: Two blocks A (wA=12 N) and B (wB=20 N)…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Two blocks A (wA=12 N) and B (wB=20 N) are connected by very light string that passes over a frictionless pulley (as shown in Figure 3.8). Block B rest on top of a horizontal tabletop and has a coefficient of kinetic friction against between of 0.15. Block A is suspended on the other end and it does not hit the edge of the tabletop. When the system is released from rest, block A descends to 75 cm. (a) What is the total work done on the system? (b) Using work-energy theorem, what is the speed of each blocks as block A descends to 75 cm?

2. Two blocks A (WA=12 N) and B (Ws=20 N) are connected by very light string
that passes over a frictionless pulley (as shown in Figure 3.8). Block B rest
on top of a horizontal tabletop and has a coefficient of kinetic friction
against between of 0.15. Block A is suspended on the other end and it does
not hit the edge of the tabletop. When the system is released from rest,
block A descends to 75 cm. (a) What is the total work done on the system?
(b) Using work-energy theorem, what is the speed of each blocks as block A
descends to 75 cm?
20 N
12 N
Fig. 3.8
3. The work done on a stretching a spring it to 3.50 cm from its equilibrium
length is 14.0 J. (a) How much force is required to stretch it at that
distance? (b) If a block of mass 2.75 kg moving at 4.8 m/s hits and runs into the same spring at its
unstretched length, what is maximum compression of the spring?

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