The minimum gradient of a curve on a displacement-time graph of a ball thrown vertically upwards and caught back can be:
Correct answer: A. Zero
- A. Zero
- B. 9.81
- C. 90 degrees
- D. Equal to the final velocity of the motion
Explanation
The minimum gradient (slope) is zero at the highest point where velocity is momentarily zero.
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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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