A football is thrown toward a receiver with an initial speed of 17.5 m/s at an angle of 35.2◦ above the horizontal. At that instant, the receiver is 16.7 m from the quarterback. The acceleration of gravity is 9.81 m/s^2
With what constant speed should the receiver run to catch the football at the level at
which it was thrown?
Answer in units of m/s
The receiver must run 16.7 m while the ball is in the air. The air time is
2*Vo*sin35.2/g = 2.06 seconds
Required average speed of receiver =
16.7/2.06 = 8.1 m/s