A Man Pulls a Sled Along a Rough Horizontal Surface $\theta$

Multiple Choice

A man pulls a sled along a rough horizontal surface by applying a constant force at an angle $\theta$ above the horizontal. In pulling the sled a horizontal distance d, the work done by the man is:

A) Fd
B) Fd cos $\theta$
C) Fd sin $\theta$
D) Fd/cos $\theta$
E) Fd/sin $\theta$