At the County Fair,a Greased Pig Is Slid Up a Long

Multiple Choice

At the county fair,a greased pig is slid up a long ramp that is inclined above the horizontal.Assuming his pork belly slides frictionlessly along the ramp,and that he is projected from the very bottom of the ramp,travelling up the ramp 7.5 m before he momentarily stops and reverses course,what is the angle of inclination if his initial speed is 7.5 m/s?

A) 21 ^$\circ$
B) 22 ^$\circ$
C) 23 ^$\circ$
D) 67 ^$\circ$
E) 68 ^$\circ$