ncert solutions physics class 11th

According to the law of conservation of momentum, the total momentum of an isolated system before and after an event remains constant if no external force acts on it. The event can be a collision. Momentum is the product of an object's velocity and mass. For example, in the case of a collision betwe

According to the class 11 physics laws of motion, static friction is stronger than kinetic friction. It is the frictional force that resists the motion initiation between two objects. The largest static friction is proportional to the normal force. When two objects are already in motion relative to

Mass measures the amount of matter an object contains and it is a fundamental property of an object. It remains constant irrespective of the object's location, it is a scalar quantity. The SI unit of mass is the kilogram (kg). On the other hand, weight is a vector quantity and refers to the force ex

Momentum has both magnitude and direction and it is a vector quantity. The direction of the momentum is the same as the direction of the velocity. It quantifies the "quantity of motion" of an object and reflects how fast it is moving and how much mass the object has, the standard SI unit for momentu

When all the forces act on a single object, a free body diagram (FBD) graphically represents these forces. It helps in analyzing the net effect of the forces by isolating the object from its environment. An arrow pointing in the direction of a force represents a force and its magnitude is also label

Inertia is the body's inherent property to resist any change in its state of rest or motion. Newton's First Law of Motion says that unless an external force is applied to an object, it will not change its state (rest or motion). Hence, the first law of Newton defines inertia. It also says that if th

According to Newton's third law of motion, every action has an equal and opposite reaction. These action-reaction forces act on different objects. The real-world example is a person walking, when the person takes a step forward, their foot pushes backward on the ground, the ground also exerts an equ

Newton's second law states that an object's rate of change of momentum is in the direction of the force, and it is directly proportional to the applied force. Mathematically, it is represented as F=ma. 
F is the net force acting on a body which is the vector sum of all individual forces acting o

Doppler Effect in class 11 chapter 14 waves refers to the variation in the wavelength or frequency of a wave in relation to an observer moving relative to the wave source. When the wave source moves toward the observer, the frequency increases, and waves are compressed. If the source moves away, the