What is the applied force needed to move a 50.0kg suitcase at a constant velocity horizontally across the floor if the coefficient of kinetic friction is 0.700?

***not sure!! :( thank you!! :D

Question

What is the applied force needed to move a 50.0kg suitcase at a constant velocity horizontally across the floor if the coefficient of kinetic friction is 0.700?

***not sure!! :( thank you!! :D

danjs · Answer

Constant velocity, no acceleration. The applied force will equal the friction force in opposite direction.

anonymous · Answer

oh, so it would be 0.700 ? the applied force needed to move the suitcase? :/

danjs · Answer

no that is the coefficient of kinetic friction, you have to find the force from friction

anonymous · Answer

ohh okay! how do we do that? find the force from friction? :O

anonymous · Answer

@DanJS ?

danjs · Answer

i dont remember, normal force x something

anonymous · Answer

could we use f=m*a?

anonymous · Answer

:/

danjs · Answer

kinetic coefficient times the normal force = Force of the friction

anonymous · Answer

ohh okay

so 0.700 * x = 50 ?

solve for x? 

x=71.429 ?

danjs · Answer

|dw:1421014006870:dw|

anonymous · Answer

ohh what do we do from here? :O

mathstudent55 · Answer

50 kg is a mass that needs to be converted to a weight.

danjs · Answer

The force applied = Force of friction, 

Force of friction = coefficient * Normal Force

Normal Force = Mass*Gravity