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A ball falls vertically and bounces on the ground. The following statements are about the forces acting while the ball is in contact with the ground. Which statement is correct?

Correct answer: B. The force that the ball exerts on the ground is always equal in magnitude and opposite in direction to the force the ground exerts on the ball

  • A. The force that the ball exerts on the ground is always equal to the weight of the ball
  • B. The force that the ball exerts on the ground is always equal in magnitude and opposite in direction to the force the ground exerts on the ball
  • C. The force that the ball exerts on the ground is always greater than the weight of the ball
  • D. Both A and C

Explanation

When the ball hits the ground, it exerts a force on the ground, and by Newton's third law, the ground exerts an equal and opposite force on the ball. This contact force is greater than the ball's weight to accelerate it upward during the bounce. Therefore, the correct statement is B.

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About Force and Motion

Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.

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