Question

What results for a moving body to resist a change in its state of motion?
A. its acceleration
B. its speed
C. its inertia
D. its weight

Answer 1

Hint: The characteristic property of a body by virtue of which it resists any variation in its state of rest or of motion in a straight line on its own is known as its inertia. A variation in either the speed of a body, or its direction of motion and sometimes both of these can be defined as a change in its state of motion.

Complete answer:
Inertia is defined as the opposition of any physical body to any variations in its velocity. This comprises the variations to the speed of the body, or the direction of its motion. The basic concept of this property is the tendency of the bodies to keep moving in a straight line at a fixed speed, when the forces are not acting upon them. Newton’s first law of motion is explaining this phenomena. The first law is sometimes known as the law of inertia. There is an external force still acting in the opposite direction of inertia, which is having a specific mass. As we accelerate the body, the velocity enhances and as a result, the mass will increase. The increase in the mass will come up with an opposite force. The larger the mass of the object, the higher will be the inertia.

So, the correct answer is “Option C”.

Note:
There are basically three types of inertia. Inertia of rest says that when an object stays where it is kept and it will stay there itself until an external force is acted over them. Inertia of motion is that the body will remain at the similar speed until a force acts on it. Inertia of direction is that the object will remain moving in the similar direction unless a force experiences on it.