In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.0808 s, during which time it experiences an acceleration of 205 m/s2.The ball is launched at an angle of 52.5 ° above the ground. Determine the (a) horizontal and(b) vertical components of the launch velocity.

(a) Number _____                Units _____

(b) Number _____                Units _____

 

A ball of mass 0.5 kg, initially at rest, is kicked directly toward a fence from a point 20 m away, as shown below. The velocity of the ball as it leaves the kicker's foot is 18 m/s at angle of 55 degree above the horizontal. The top of the fence is 9 m high. The kicker's foot is in contact with the ball for 0.06 s. The ball hits nothing while in flight and air resistance is negligible. The acceleration due to gravity is 9.8 m/s2. Determine the magnitude of the average net force exerted on the ball during the kick. Answer in units of N. Determine the time it takes for the ball to reach the plane of the fence. Answer in units of s. Hint: Consider the diameter of the ball to be negligible. How far above the top of fence will the ball pass? Answer in units of m. What is the vertical component of the velocity when the ball reaches the plane of the fence? Answer in units of m/s.