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Answers
Answer:Kinetic energy is energy possessed by an object in motion. The earth revolving around the sun, you walking down the street, and molecules moving in space all have kinetic energy.
Kinetic energy is directly proportional to the mass of the object and to the square of its velocity.
SI unit of Kinetic energy is joules
Explanation:
Que3 (1)Therefore, Kinetic Energy is reduced to half, when mass is doubled
(2) If velocity is doubled, Kinetic Energy increases by 4 times
(3)if we triple the velocity of body the K.E will become nine times of the initial K.E. The Kinetic Energy is increased by a factor of 9 if the velocity is tripled.
Que 4
Ans Potential energy is the work done to take a body to a certain height. For a body with mass m, h is the distance to which it is raised and g is the gravitational force acting on the body, then work done W is given as:
Potential Energy DerivationW = force * displacementW = mg * h∴ W = mghAs the work done is equal to mgh which is gained by the object, potential energy Ep is given as:Ep = mgh
Therefore, the above is the derivation of potential energy.
Potential energy is defined as the energy that is held by an object because of its position with respect to other objects.
The SI unit of potential energy is joule whose symbol is J
.Brother hope it will help you!
