Explain Motion of Centre of Mass
Let consider the motion of the centre of mass of the Earth and moon system (Figure). The moon moves round the Earth in a circular…
Physics
What is Centre of Mass?
In translator motion of a body; every particle experiences equal displacement with time; therefore the motion of the whole body may be represented by a…
Motion: Mathematical Problems
Math prob (a): The driver of a car travelling at 72 kmph observes the light 300 m ahead of him turning red. The traffic light…
Define Elastic Collision and Inelastic Collision
Elastic Collision: If the kinetic energy of the system is conserved during a collision, it is called an elastic collision. The total kinetic energy before…
What is Collision?
A collision between two particles is said to occur if they physically strike against each other or if the path of the motion of one…
What is Power?
Power is defined as the rate at which work is done. Power = Work done / time Its unit is watt and dimensional formula is…
Law of Conservation of Energy
Law of Conservation of Energy states that, if a body or system of bodies is in motion under a conservative system of forces, the sum of…
Define Conservative Forces and Non-Conservative Forces
Conservative forces: If the work done by a force in moving a body between two positions is independent of the path followed by the body.…
Expression for the Potential Energy
The potential energy of a body is the energy stored in the body by virtue of its position or the state of strain. Hence water…
What is Energy?
Energy can be defined as the capacity to do work. Energy can manifest itself in many forms like mechanical energy, thermal energy, electric energy, chemical…
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