A 100. N block sits on a rough horizontal floor. The coefficient of sliding friction between the block and the floor is 0.250. A horizontal force of 90.0 N acts on the block for 3.00 seconds. Calculate the velocity of the block after 3.00 seconds if it starts from rest.

How would I set up this problem? I just need to know the exact formulas to use.

Question

A 100. N block sits on a rough horizontal floor.  The coefficient of sliding friction between the block and the floor is 0.250.  A horizontal force of 90.0 N acts on the block for 3.00 seconds.  Calculate the velocity of the block after 3.00 seconds if it starts from rest.

How would I set up this problem? I just need to know the exact formulas to use.

surry99 · Answer

Start by drawing a FBD of the block.

anonymous · Answer

|dw:1415216354802:dw|

isaiah.feynman · Answer

|dw:1415216667009:dw|

anonymous · Answer

@Isaiah.Feynman How would I solve the problem using your diagram?

isaiah.feynman · Answer

Its still the same diagram. Use Newton's second law.

anonymous · Answer

Would I use the formula F = m dv/dt ? @Isaiah.Feynman

surry99 · Answer

Fnet = ma = m dv/dt
what is the net force on the block?

anonymous · Answer

@surry99 190N?