Question

a tennis racquet swings to the left and hits a moving tennis ball.
a swinging tennis racquet hits a moving tennis ball with 500 newtons of force.
a tennis racquet hits a moving tennis ball with 120 newtons of force.
a tennis racquet swings to the right and hits a moving tennis ball.
:: a tennis ball moves to the left.
:: a tennis ball moves to the right.
:: a tennis ball exerts a force of 500 newtons.
:: a tennis ball exerts a force of 120 newtons

Explanation:

Step1: Analyze the first statement

A tennis racquet swings to the left and hits a moving tennis ball. According to Newton's third law, when the racquet exerts a force on the ball, the ball exerts an equal and opposite force on the racquet. But we are mainly concerned with the ball's motion. If the racquet is moving left and hits the ball, the ball will move to the left.

Step2: Analyze the second statement

A swinging tennis racquet hits a moving tennis ball with 500 newtons of force. By Newton's third law, the ball exerts a force of 500 newtons on the racquet.

Step3: Analyze the third statement

A tennis racquet hits a moving tennis ball with 120 newtons of force. By Newton's third law, the ball exerts a force of 120 newtons on the racquet.

Step4: Analyze the fourth statement

A tennis racquet swings to the right and hits a moving tennis ball. According to Newton's third law, when the racquet exerts a force on the ball, the ball exerts an equal and opposite force on the racquet. But we are mainly concerned with the ball's motion. If the racquet is moving right and hits the ball, the ball will move to the right.

Answer:

• A tennis racquet swings to the left and hits a moving tennis ball: A tennis ball moves to the left.
• A swinging tennis racquet hits a moving tennis ball with 500 newtons of force: A tennis ball exerts a force of 500 newtons.
• A tennis racquet hits a moving tennis ball with 120 newtons of force: A tennis ball exerts a force of 120 newtons.
• A tennis racquet swings to the right and hits a moving tennis ball: A tennis ball moves to the right.