Physics 30 Projectiles, Circular Motion, and Friction Assignment P. 2 2. If a quarterback can throw a football with a velocity of 17 m/s [450 from the horizontal], how far down field will it land? (6marks) 3. A girl rides a merry-go-round with a radius of 4.0 m. If it takes her 66 seconds to complete 10 revolutions, what is her centripetal acceleration? (3 marks)Physics 30 Projectiles, Circular Motion, and Friction Assignment P. 3 4 . A car exits a freeway on a circular exit ramp with a velocity of 28.5 m/s? If the radius of the ramp is 60 m, what is the minimum that the coefficient of friction must be? Assume that the exit ramp is not banked. (3 marks) A 75 kg pilot is at the bottom of a loop with a radius of 700 m. With what speed must she 5 . be flying if she has an apparent weight (the force that the seat pushes up on her) of 2205 N? (5 marks)Physics 30 Projectiles, Circular Motion, and Friction Assignment P. 4 6. You slide a 325 N box up a 20.0 inclined plane with a constant velocity by exerting a force of 21IN parallel to the inclined plane. What is the size of the friction force