Answer
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Hint The property of a body by virtue of which it tends to retain its existing state of rest or its uniform motion along a straight line unless and until an external force is applied on it is known as Inertia. A more heavy body will have a greater tendency to retain its inertia of rest or motion.
Complete step by step answer
Let us first discuss inertia.
The property of a body by virtue of which it tends to retain its existing state of rest or its uniform motion along a straight line unless and until an external force is applied on it is known as Inertia.
Inertia is mainly of three types:
1. Inertia of rest: When a bus or train starts to move suddenly after being in rest, a jerk is experienced by the passengers sitting inside and they fall in a backward direction due to inertia of rest.
2. Inertia of motion: When a bus or train stops suddenly after being in motion, a jerk is experienced by the passengers sitting inside and they lean in the forward direction due to inertia of motion.
3. Inertia of direction: We can use an umbrella to protect ourselves from rain as the rain drops falls downwards and doesn’t change its direction due to inertia of direction.
Inertia is a measure of mass of a body and it is directly proportional to mass of a body. This means greater the mass of a body greater will be its inertia or vice-versa. A more heavy body will have a greater tendency to retain its inertia of rest or motion.
Therefore, mass of the body is the measure of inertia.
Hence, option A is correct.
Note Inertia can be considered as a force. Inertia is best explained by Newton’s 1st law of motion which states that a body continues to be in its state of rest or in uniform motion along a straight line unless an external force is applied on it. This law is also known as the Law of Inertia.
Complete step by step answer
Let us first discuss inertia.
The property of a body by virtue of which it tends to retain its existing state of rest or its uniform motion along a straight line unless and until an external force is applied on it is known as Inertia.
Inertia is mainly of three types:
1. Inertia of rest: When a bus or train starts to move suddenly after being in rest, a jerk is experienced by the passengers sitting inside and they fall in a backward direction due to inertia of rest.
2. Inertia of motion: When a bus or train stops suddenly after being in motion, a jerk is experienced by the passengers sitting inside and they lean in the forward direction due to inertia of motion.
3. Inertia of direction: We can use an umbrella to protect ourselves from rain as the rain drops falls downwards and doesn’t change its direction due to inertia of direction.
Inertia is a measure of mass of a body and it is directly proportional to mass of a body. This means greater the mass of a body greater will be its inertia or vice-versa. A more heavy body will have a greater tendency to retain its inertia of rest or motion.
Therefore, mass of the body is the measure of inertia.
Hence, option A is correct.
Note Inertia can be considered as a force. Inertia is best explained by Newton’s 1st law of motion which states that a body continues to be in its state of rest or in uniform motion along a straight line unless an external force is applied on it. This law is also known as the Law of Inertia.
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