A stone is dropped from a cliff. The graph (Position or velocity versus time) which best represents motion when it falls:
Correct answer: B. A straight-line graph with a positive slope (Velocity vs. Time)
- A. A curved graph with increasing slope (Position vs. Time)
- B. A straight-line graph with a positive slope (Velocity vs. Time)
- C. A straight-line graph with a constant slope (Position vs. Time)
- D. A curved graph with an increasing slope (Velocity vs. Time)
Explanation
This represents velocity increasing at a constant rate, which matches the equation v=gtv = g tv=gt.Since free-fall motion results in a linearly increasing velocity, this is correct for a velocity-time graph.
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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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