(C) 2 m\'s in the same direction as the ball\'s motion (D) 2 m/s in the opposite

Question

(C) 2 m's in the same direction as the ball's motion (D) 2 m/s in the opposite direction of the ball's motion (50)-(%) (10) 32·The two blocks of masses M and 2M shown above initially travel at the same speed v but in opposite directions. They collide and stick together. How much mechanical energy is lost to other forms of energy during the collision? (A) 1/2 M v (B) 3/4 M v (C) 4/3 M v (D) 3/2 M v 0. Which of the following is true when an object of mass m moving on a horizontal frictionless surface hits and h i initially at rest on the surface?

Explanation / Answer

Here ,

32) let the velocity after the collision is u

Using conservation of momentum

M * v - 2M * v = (2M + M) * u

u = v/3

mechanical energy lost = initial mechanical energy -final mechanical energy

mechanical energy lost = 0.50 * M * v^2 + 0.50 * 2M * v^2 - 0.50 * 3M * (v/3)^2

mechanical energy lost = 4/3 M * v^2

the mechanical energy lost is C) 4/3 M * v^2

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