A ball is thrown horizontally from the top of a cliff with a velocity of 10 ms-1. The ball takes 4 seconds to reach the ground. The horizontal distance traveled by the ball is:
Correct answer: A. 40 m
- A. 40 m
- B. 2.5 m
- C. 0.4 m
- D. 78.4 m
Explanation
The horizontal distance (d) traveled by the ball can be calculated using the formula:d=horizontal velocity×time of flightIn this case, the horizontal velocity is given as 10m/s and the time of flight is 4s.d=10m/s×4sd=40mTherefore, the horizontal distance traveled by the ball is 40meters.
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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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