Test: Law of Inertia (June 1) - JEE MCQ

Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction. This means that when an object exerts a force on another object, the second object exerts a force of equal magnitude but in the opposite direction on the first object. This is often referred to as the law of momentum, as the forces involved cause changes in momentum. The other laws mentioned in the question, such as the Law of Universal Gravitation, Law of Inertia, and Acceleration Law, do not directly relate to the concept of equal and opposite reactions.

This answer is correct because Newton's Law of Universal Gravitation states that every object in the universe attracts every other object in the universe. This law explains the force of gravity and how it affects objects and their motion in the universe. It is one of the fundamental laws of physics discovered by Sir Isaac Newton.

A spring scale is used to measure force. It consists of a coiled spring that stretches or compresses when a force is applied to it. The amount of stretch or compression is directly proportional to the force being applied. By reading the scale on the spring scale, the magnitude of the force can be determined. This tool is commonly used in physics experiments, engineering, and everyday applications where force measurement is required.

Momentum is defined as the product of an object's mass and its velocity. It is a measure of how difficult it is to stop or change the motion of an object. The greater the mass or velocity of an object, the greater its momentum. Therefore, momentum is the correct answer because it directly relates to the product of mass and velocity.

Force is the correct answer because it refers to a push or pull that one object exerts on another. Force is a fundamental concept in physics and is responsible for causing changes in the motion or shape of an object. It can be a contact force, such as friction, or a non-contact force, such as gravity. In this context, force encompasses all types of interactions between objects that involve a push or pull.

Inertia is the correct answer because it refers to the property of an object to resist changes in its state of motion. It is a measure of an object's mass and determines how difficult it is to change its velocity. Inertia is responsible for the tendency of objects to stay at rest or in motion unless acted upon by an external force. This property is observed in everyday situations, such as when a moving car suddenly stops and passengers continue to move forward due to their inertia.

The net force on the object is 2 N. This means that the total force acting on the object is 2 N, taking into account all the individual forces acting on it.

The given statement describes Newton's First Law of Motion, also known as the Law of Inertia. This law states that an object at rest will remain at rest, and an object in motion will continue to move with a constant speed and direction, unless acted upon by an external force. This law is also referred to as the Law of Inertia because it explains how objects resist changes in their state of motion. The other options, such as Newton's Law of Universal Gravitation, Momentum Law (Third Law), and Acceleration Law (Second Law), do not accurately describe the concept mentioned in the statement.

The given statement states that the change of motion of an object depends on the size of the force and the mass of the object. This statement aligns with Newton's Second Law of Motion, which states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. Therefore, the correct answer is the Acceleration Law (Second Law).

Gravity is the force of attraction between any two objects in the universe. It is responsible for keeping planets in orbit around the sun, objects on Earth's surface, and even the formation of galaxies. Gravity is a fundamental force that acts over long distances and is proportional to the mass of the objects involved. It is described by Isaac Newton's law of universal gravitation, which states that the force of gravity is directly proportional to the product of the masses of the objects and inversely proportional to the square of the distance between them.