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13 Dec 2019

Two crates, ofmass m1 = 60 kgandm2 = 130 kg, are in contact and at rest onahorizontal surface. A 620 N force is exerted onthe 60 kg crate.The coefficientof kinetic friction is 0.15.


(a)Calculate the acceleration of the system.
_____m/s2 (tothe right)
(b) Calculate the force that each crate exerts on theother.
_____N
(c) Repeat with the crates reversed.
acceleration m/s2
crate force N

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

Two crates, of mass 80kg and 110kg are in contact and at rest on a horizontal surface. A 650N force is exerted on the 80kg crate. If the coefficient of kinetic friction is .30, calculate (a) the acceleration of the system and (b) the force that each crate exerts on each other.

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Question is as follows:
Two wooden crates rest on topof one another. The smaller top crate has a mass of m1 = 22 kg andthe larger bottom crate has a mass of m2 = 91 kg. There is NOfriction between the crate and the floor, but the coefficient ofstatic friction between the two crates is µs = 0.84 and thecoefficient of kinetic friction between the two crates is µk =0.66. A massless rope is attached to the lower crate to pull ithorizontally to the right (which should be considered the positivedirection for this problem).
1) The rope is pulled with a tensionT = 466 N (which is small enough that the top crate will notslide). What is the acceleration of the small crate? Correct:Answer: 4.12m/s.
2) In the previous situation,what is the frictional force the lower crate exerts on the uppercrate?
Correct Answer: 90m/s
3) What is the maximum tension that thelower crate can be pulled at before the upper crate begins toslide? Correct Answer 930N
4) The tension is increased in the rope to1322 N causing the boxes to accelerate faster and the top box tobegin sliding. What is the acceleration of the uppercrate?
5) As the upper crate slides, what is theacceleration of the lower crate?

1. Two crates, one with a mass of m1 and the other with a massof m2, are connected by a rope that passes over a pullley(frictionless). M1 is equal to 60 kg. So, if M1 acceleratesdownward at 4.5 m/s2, what is the value of mass m2?
2.A block on a frictionless horizontal surface is attached tospring with a force constant (k) of 600 N/m. The block is pulled adistance of x to the right of it's equilibrium and then releasedfrom rest. If the kinetic energy of the block at the instant itpasses through its equilibrium position is 4.5 J, what was theinitial displacement from the equilibrium position?

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