Moderate

Two balls are released simultaneously from a point 'A' with zero vertical velocity as shown in the given diagram.These balls followed different paths but reached the ground at the same time due to the

Correct answer: B. Horizontal velocity.

  • A. Same size of balls
  • B. Horizontal velocity.
  • C. Same vertical height
  • D. Horizontal acceleration

Explanation

The time it takes for an object to reach the ground is determined by its initial vertical velocity and the height from which it is released, not by its horizontal velocity. Since both balls are released simultaneously with zero vertical velocity, they are only affected by gravity, which acts vertically. Thus, they reach the ground at the same time. The horizontal velocity does not influence the time it takes for the balls to fall. Option A is incorrect because the size of the balls does not affect their fall time in the absence of air resistance. Option C is incorrect because while the same vertical height ensures the same fall time, the question focuses on the effect of horizontal velocity. Option D is incorrect because horizontal acceleration does not affect vertical fall time.

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About Projectile Motion

Projectile motion combines uniform horizontal motion with vertically accelerated motion under gravity, assuming air resistance is neglected. Questions use the components of initial velocity to find time of flight, maximum height, horizontal range and position, while distinguishing projectile motion from general circular or one dimensional motion.

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