If you throw a ball downward, then its acceleration immediately after leaving your hand, assuming no air resistance, is:
Correct answer: A. 9.8 m/s2
- A. 9.8 m/s2
- B. Less than 9.8 m/s2
- C. More than 9.8 m/s2
- D. Speed of throw is required for answer
Explanation
The following is the solution: Option A is correct because if the ball's initial velocity is downward, the acceleration immediately after leaving your hand is 9.8 m/s².
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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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