Question

what effect does the inertia of an object have on the object?
a to increase its speed
b to decrease its speed
c to resist any change in its state of motion
d to decelerate due to friction

Explanation:

Inertia is a property of matter. According to Newton's first law of motion, an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. Inertia is the tendency of an object to resist changes in its state of motion. Options a (increasing speed) and b (decreasing speed) imply a change in motion which is contrary to the nature of inertia. Option d (decelerating due to friction) is about an external force (friction) causing a change in motion, not inertia.

Answer:

C. to resist any change in its state of motion