Physics Hwk. Problem: Frictional Force

shawonna23

I am really stuck on how to even start solving this problem, can someone help me please!!

A 2.5 kg block is pushed along a horizontal floor by a force F of magnitude 17 N at an angle = 35° with the horizontal. The coefficient of kinetic friction between the block and floor is 0.25.

a.Calculate the magnitude of the frictional force on the block from the floor.
b.Calculate the magnitude of the acceleration of the block.

Andrew Mason

The force F provides a downward component and a horizontal component. Work out the magnitude of each component.

The downward component provides additional normal force (in addition to mg). The normal force determines the horizontal frictional force:

The acceleration is determined by the horizontal component of F minus the horizontal friction force.

AM