A Football Player Kicks a 0

Multiple Choice

A football player kicks a 0.41-kg football initially at rest; and the ball flies through the air. If the kicker's foot was in contact with the ball for 0.051 s and the ball's initial speed after the collision is 21 m/s, what was the magnitude of the average force on the football?

A) 9.7 N
B) 46 N
C) 81 N
D) 170 N
E) 210 N