Short Tricks for Revision: Newton's Laws of Motion Video Lecture | Physics Class 11 - NEET

Ans. Newton's three laws of motion are: 1. The law of inertia: An object at rest tends to stay at rest, and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an external force. 2. The law of acceleration: The acceleration of an object is directly proportional to the net force applied to it and inversely proportional to its mass. The direction of acceleration is in the direction of the net force. 3. The law of action-reaction: For every action, there is an equal and opposite reaction. This means that whenever an object exerts a force on another object, the second object exerts an equal and opposite force on the first object.

Ans. Newton's laws of motion are applicable to everyday life in various ways: 1. Driving a car: When you accelerate or brake, Newton's second law of motion comes into play. The force applied to the car determines its acceleration or deceleration. 2. Sports activities: In activities like throwing a ball, swimming, or running, Newton's laws of motion are involved. For example, when you throw a ball, the force applied to it determines its speed and direction. 3. Riding a bicycle: Balancing on a bicycle involves the laws of motion. The law of inertia keeps the bicycle and the rider moving forward unless acted upon by an external force. 4. Jumping on a trampoline: The upward force exerted by the trampoline on the jumper is an example of Newton's third law of motion. The force exerted by the jumper on the trampoline is equal and opposite to the force exerted by the trampoline on the jumper. 5. Pushing or pulling objects: When you push or pull an object, you are applying force to it, and Newton's laws determine its motion. The force you apply determines the object's acceleration or deceleration.

Ans. The law of inertia, also known as Newton's first law of motion, states that an object at rest tends to stay at rest, and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an external force. In other words, an object will maintain its state of motion (either at rest or moving) unless a force acts on it. The inertia of an object determines its resistance to changes in motion.

Ans. According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force applied to it and inversely proportional to its mass. The formula to express this relationship is F = ma, where F represents the net force applied to an object, m represents the mass of the object, and a represents the acceleration produced by the force. This means that a greater force applied to an object will result in a greater acceleration, while a greater mass will result in a smaller acceleration for the same force.

Ans. Yes, one example of Newton's third law of motion is the action-reaction pair observed when you walk. When you exert a force on the ground by pushing it backward with your foot, the ground exerts an equal and opposite force on your foot, pushing it forward. This action-reaction pair of forces allows you to move forward while walking. Similarly, when you swim, the action of pushing the water backward with your hands and feet creates a reaction force that propels you forward.