The tendency of a moving object to continue moving in a straight line or a stationary object to remain in place is called
a. orbital speed.
b. mass.
c. inertia.
d. gravity.

The correct answer of this question is : C) Inertia.

EXPLANATION :

Before going to answer this question, first we have to understand Newton's first law of motion.

From Newton's first law of motion, we know that everybody continues to be at state of rest or of uniform motion along a straight line unless and until it is compelled by some external unbalanced force.

Hence, the body will not change its state of rest or motion, if it is not subjected to external unbalanced force.

This inherent tendency of an object to resist the change of state of rest or of uniform motion in straight line is called inertia.

Hence, inertia is the property of a body by virtue of which it is unable to change its state of rest, state of uniform motion or direction.

Hence, the correct answer of this question is inertia.

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