Linear momentum is the product of mass and linear velocity. Momentum is directly proportional to the object’s mass and also its velocity. Thus,... View Article
The concave mirrors are used in reflecting telescopes as parabolic mirrors, in magic lanterns, and in cinema projectors etc. If a hollow sphere... View Article
Convex mirrors have very wide field of view as they are curved outwards. So, the convex mirrors enable the driver to view much larger area than a... View Article
Energy is conserved in free-fall situations (no external forces doing work). Thus, the total energy would be the same at every stage in falling.... View Article
The kinetic energy of a body changes from 12 J to 60 J due to the action of a force of 5N on an object of mass 4 kg. The work done by the force... View Article
u = 60 m/s, v = 0. The value of acceleration due to gravity is g = 9.8 m/s2From equation, 2aS = v2 – u2We have a = g.S = v2 - u2 / 2a   = 0 -... View Article
For vertically upward motion: g is negative as it opposes the motion. v = u - gt 0 = u - gt t = u/g                .....(1) For vertically... View Article
When we dip our finger in the water, the water exerts upward thrust on the finger (Archimedes's principle). Due to Newton's third law of motion,... View Article
In SI system, the gravitational unit of force is kilogram - weight. It is that force which when acting on a body of mass 1 kg produces an... View Article
During sound wave propagation particles vibrate at its position and energy is transferred. Particles themselves do not move from one source to another.... View Article
To every action there is an equal and opposite reaction is the statement of Sir Isaac Newton. and this is the third law of motion. The other two... View Article
It is not always necessary that two bodies can exert force on one another only when they are in contact. They can be separated by any distance.... View Article
