Final answer:
The student's questions involve the physics of projectile motion, specifically calculating angles for a basketball free throw and a tennis serve, and determining the force exerted on a bouncing ball.
Step-by-step explanation:
The question asked is one of projectile motion, which is a common topic in high school physics. Specifically, it relates to calculating the angle of release for a basketball shot and a service in tennis, as well as understanding the force exerted on a ball by the floor after a bounce. To solve these problems, one would apply the principles of kinematics, considering both the horizontal and vertical motion separately and using equations that relate displacement, velocity, acceleration, and time.
For the basketball shot, one must calculate the angle at which the ball must be thrown to reach the basket, taking into account the initial speed, the distance to the basket, and the difference in height between the release point and the basket. For the tennis serve, the angle required for the ball to just cross the net and land within the service box must be determined. And for the bouncing ball, the average force exerted by the floor during the collision is found by analyzing the change in momentum and the time period of the bounce.