To move a large crate across a rough floor, you push on it with a force F at an angle of 21 below the horizontal, as shown in Figure 6-21.

To move a large crate across a rough floor, you push on it with a force F at an angle of 21° below the horizontal, as shown in Figure 6-21. Find the force necessary to start the crate moving, given that the mass of the crate is m = 32 kg and the coefficient of static friction between the crate and the floor is 0.54.