When a stone is thrown horizontally with 2 m/s from a building of height 5 m, then just before hitting the ground its acceleration is _.
Correct answer: C. 9.8 m/s2
- A. 12 m/s2
- B. 13 m/s2
- C. 9.8 m/s2
- D. 7.6 m/s2
Explanation
For horizontal motion, we assume that air resistance is negligible, so the acceleration due to gravity i.e. 9.8m/s2 remains constant.
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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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