# Two dimensional forces

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**Forces applied at an angle**A 4.25 kg box is pushed across the floor with a force of 31.0 N at 35.0° below the horizontal. The coefficient of friction between the box and the floor is $\mu$ = 0.125.

i. What is the normal force acting on the box?

ii. What is the force of friction acting on the box?

iii. Find the acceleration of the box.

**Forces on an incline**- A 3.70 kg box is placed at the top of an icy slope with a 28.0° incline. Assume no friction. Find the acceleration of the box down the slope.
- A 347.5 kg container is pulled up a 38.0° by a winch at 1.00 m/s. The coefficient of friction between the ramp and the box is 0.234. How much force does the winch need to pull with to keep the container moving up the ramp with this speed?