Physics-
General
Easy

Question

A particle of mass m moving horizontally with v0 strikes a smooth wedge of mass M, as shown in figure. After collision, the ball starts moving up the inclined face of the wedge and rises to a height h.

The final velocity of the wedge v2 is

  1. fraction numerator m v subscript 0 end subscript over denominator M end fraction    
  2. fraction numerator m v subscript 0 end subscript over denominator M plus m end fraction    
  3. v subscript 0 end subscript    
  4. insufficient data    

The correct answer is: fraction numerator m v subscript 0 end subscript over denominator M plus m end fraction

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The diagram to the right shows the velocity-time graph for two masses R and S that collided elastically. Which of the following statements is true?

I) R and S moved in the same direction after the collision.
II) Kinetic energy of the system (R & S) is minimum at t = 2 milli sec.
III) The mass of R was greater than mass of S.

The diagram to the right shows the velocity-time graph for two masses R and S that collided elastically. Which of the following statements is true?

I) R and S moved in the same direction after the collision.
II) Kinetic energy of the system (R & S) is minimum at t = 2 milli sec.
III) The mass of R was greater than mass of S.

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Adjoining figure shows a force of 40 N acting at 30° to the horizontal on a body of mass 5 kg resting on a smooth horizontal surface. Assuming that the acceleration of free–fall is 10 ms–2, which of the following statements A, B, C, D, E is (are) correct?

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