What is the Required Horizontal Force for a Shopping Cart on an Inclined Plane?

[whoopie88]

Homework Statement

A shopper pushes a 7.3 kg shopping cart up a 13° incline, as shown in Figure 5-24. Find the magnitude of the horizontal force, F, needed to give the cart an acceleration of 1.67 m/s2.

Figure 5-24

Homework Equations

All forces equations.

The Attempt at a Solution

Help?

 

[Doc Al]

Realize that the applied force is horizontal, not parallel to the incline.

 

[whoopie88]

Ohhh, thank you, I got the answer!