a crate mass of 150.0 kg lies at rest on a horizontal storage room floor. The co

Question

a crate mass of 150.0 kg lies at rest on a horizontal storage room floor. The coefficient of static friction between the crate and the floor is 0.70, and the coefficient of kinetic friction is 0.35. may assume g= 10m/s^2

a) someone pulls on a horizontal rope attached to the crate with a force of 200N. does the crate remain at rest or start moving? if it moves does it have constant speed or continue to accelerate? if i accelerates, what is its acceleration? under these conditions what is the frictional force on the crate?

b) answer part B again if the pull on the rope is 1000N.

c) what force on the rope is needed to start the crate sliding?

Explanation / Answer

max static friction force = coefficient x mass x g
= 0.70 x 150 x10
= 1050 N


a) . crate remain at rest because 200N force is less than static friction.it does not move.
frictional force will be same as the pulling force 200N .


b).again crate remain at rest

c). 1050 N force is nedded to start the crate sliding

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