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JEE Main202622 January 2026Morning ShiftPhysicsMotion in Two DimensionsActual

A projectile is thrown upward at an angle 60^ with the horizontal. The speed of the projectile is 20 ~m / s when its direction of motion is 45^ with the horizontal. The initial speed of the projectile is _ _ _ _ m / s .

Options

  1. A20 2
  2. B40
  3. C40 2
  4. D20 3

Correct answer

A. 20 2

Step-by-step solution

Horizontal velocity is constant: v_x = u 60° = u 2 . When direction is 45° with horizontal and speed is 20 m/s: v_x = 20 45° = 20 2 . u 2 = 20 2 u = 40 2 = 20 2 m/s.

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