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JIPMER2015PhysicsMotion in One Dimension

A rod P Q of length l is moving with ends remaining in contact with frictionless wall and floor. If at the instant, shown the velocity of end B is 2 ~m / s towards negative direction of x . The speed of end A will be

Options

  1. A3 ~ms ⁻¹
  2. B2 3 ~ms ⁻¹
  3. C2 ~ms ⁻¹
  4. D5 2 ~ms ⁻¹

Correct answer

B. 2 3 ~ms ⁻¹

Step-by-step solution

From the diagram in question, array rlrl x & =1 and y=1 & v_x & = d x d t =-1 d d t array and v_y= d y d t =1 d d t v_y v_x =- or v_y=-v_x Since, v_x=-2 ~m / s Hence, v_y=(-2) 60^ =-2 1 3 =- 2 3 ~ms ⁻¹ The negative sign indicates the motion towards negative direction of Y .

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