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KCET2013PhysicsMotion in Two Dimensions

A projectile is projected at 10 ~ms ⁻¹ by making at an angle 60^ to the horizontal. After some time its velocity makes an angle of 30^ to the horizontal. Its speed at this instant is

Options

  1. A10 3
  2. B10 3
  3. C5 3
  4. D5 3

Correct answer

A. 10 3

Step-by-step solution

As the velocity makes an angle of 30^ with horizontal, so, the horizontal component of velocity at the instant will be v 30^ . array ll & v 30^ =5 & v= 5 30^ = 5 3 / 2 = 10 3 array

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