JUPEBPhysicsKinematics and Dynamics

Which of the following best describes the inertia of a body?

Athe force that keeps a body moving in a circle
Bthe product of the mass and velocity of a body
Cthe rate of change of momentum of a body
Dthe reluctance of a body to change its state of rest or uniform motionCORRECT
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Why the answer is D, and why the others tempt you.
Inertia is the tendency of a body to resist any change in its state of rest or of uniform motion in a straight line, as stated in Newton's first law; it depends on mass. The other descriptions define centripetal force, force and momentum respectively.
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