A body of mass 4.2kg moving with velocity 10ms-1 due east, hits a stationary body…

A body of mass 4.2kg moving with velocity 10ms-1 due east, hits a stationary body of mass 2.8kg. If they stick together after collision and move with velocity V due east, calculate the value of V
  • A.
    3ms-1
  • B.
    6ms-1
  • C.
    7ms-1
  • D.
    15ms-1
  • E.
    17ms-1
Correct Answer: Option B
Explanation

M1U = (M1 + M2)V = 4.2 x 10 = (4.2 = 2.8)V

∴ V =

4.2 x 10/7.0

= 6m/s

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