Answer true or false 84. An elastic collision conserves momentum and kinetic ene

Question

Answer true or false 84. An elastic collision conserves momentum and kinetic energy. 85. When two objects collide and stick together, their collision is elastic 86. Of two objects collide elastically, they must have the same mass 87. The center of mass of an isolated system moves at a constant velocity as long as a constant force is applied 83. The impulse of a force is the change in momentum it imparts to an object. 84. An elastic collision conserves momentum and kinetic energy. 85. When two objects collide and stick together, their collision is elastic. _ 86. If two objects collide elastically, they must have the same mass. -87. The center of mass of an isolated system moves at a constant velocity as long as a constant force is applied.

Explanation / Answer

83. True

84. True

85. False , its an perfectly inelastic collision.

86. False , perfecticly elastic collision means (coefficient of restitution must be 1), i.e. velocity of approach = |velocity of separation| .

87. True

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