A force is applied to an object with a finite (non-zero) mass to accelerate it.

Question

A force is applied to an object with a finite (non-zero) mass to accelerate it. The speed of the object increases until it is very close to the speed of light. If the force continues to be applied without interruption, which, if any, of the following statements is/are true about the physical properties of the moving object?

1)The speed of the object will always be less than c.
2)The rest mass of the object will increase without bound.
3)The momentum of the object will remain constant.
4)The rest mass of the object will remain constant.
5)The kinetic energy of the object will increase until reaching a maximum value.
6)The relativistic mass of the object will increase until reaching a maximum value.

Explanation / Answer

InfiniteForce A force is applied to an object with afinite (non-zero) mass to accelerate it. The speed of the object increases until it is veryclose to the speed of light. If the force continues to be applied withoutinterruption, which, if any, of the following statements is/are true about the physicalproperties of the moving object? TRUE The restmass of the object will remain constant. FALSE Therelativistic mass of the object will increase until reaching amaximum value. FALSE Therest mass of the object will increase without bound. FALSE Thekinetic energy of the object will increase until reaching a maximumvalue. TRUE Thespeed of the object will always be less than c. FALSE Themomentum of the object will remain constant.

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