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A horizontal force of 70 N is required to push a bookcase across a floor at...

A horizontal force of 70 N is required to push a bookcase across a floor at a constant velocity. Part A What is the net force acting on the bookcase? Express your answer to two significant figures and include the appropriate units.

Part B How much is the friction force that acts on the sliding bookcase? Express your answer to two significant figures and include the appropriate units.

Part C How much friction acts on the bookcase when it is at rest on a horizontal surface without being pushed? Express your answer to two significant figures and include the appropriate units. Ffr F f r = nothing nothing

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Answer #1

Concept used:- here we use Newton's law of motion with friction present for the solution, where acceleration is zero due to constant velocity,

velocit) is consta OIN rf n chon Њ.ru is zero when thine is no horizonta sno hoznta***************************************************************************************************
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