Question

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 the figure. Find the acceleration of the crate, given that the mass of the crate is m = 38 kg, the applied force is 329 N and the coefficient of kinetic friction between the crate and the floor is 0.52.

Answer 1

Use the same approach used here. Only the numbers have changed.
http://www.jiskha.com/display.cgi?id=1299462922

Answer 2

12.6