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If an iron ball and a wooden ball of the same radius are released from the height 'h' in a vacuum, then the time taken by both of them to reach the ground will be:

Correct answer: B. Equal

  • A. Unequal
  • B. Equal
  • C. Zero
  • D. None of these

Explanation

In a vacuum environment, where there is no air resistance, both the iron ball and wooden ball, despite their different materials, experience the same acceleration due to gravity. In the absence of air resistance, both objects, having the same radius and subjected to the same gravitational force, will take the same time to reach the ground.

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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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