Last seen: Nov 14, 2021
(a) Gravitational potential energy is the potential energy due to the position of the body above the ground. While elastic potential energy is the pot...
(a) The energy stored in a body due to either its position or change in shape is known as potential energy. Water stored in a reservoir is an example ...
(a) Kinetic energy of a body is the energy due to motion. (b) The kinetic energy of the body will be equal to zero as kinetic energy is directly pro...
(a) Energy is defined as the ability to do work and joule is the SI unit of energy. (b) Following are the various forms of energy: Kinetic energy...
(a) When the displacement of a body is at right angle to the direction of force acting on it, then the work done will be zero. (b) Force, F = 50 N ...
(a) Work is said to be done when applied force results in the motion of the body or change in the shape and size of the body. Work done is given as...
(a) Work is done when an applied force produces motion in a body. Formula for work done is: W = Fs Where, W is the work done F is the forc...
Mass, m = 200 kg Height, h = 2m Acceleration due to gravity, g = 9.8 m/s2 (a) Potential energy = mgh = 3920 J (b) Work done against gravity...
(a) Potential energy (b) Both potential and kinetic energy
Mass of boy, m = 40 kg Height, h = 1.5 m Acceleration due to gravity, g = 10 m/s2 (a) At highest point velocity, v = 0 Therefore, KE = 0 ...
Work done, W = 24.2 J Distance, s = 20cm = 0.2m Force = F Work done, W = Fs F = = 121N
Mass of man = m Height of tree, h = 5m Work done, W = 2500J Acceleration due to gravity, g = 10 m/s2 W = mgh m = m = 50 kg
Following are the two examples where a body possess both kinetic energy as well as potential energy: (a) a flying airplane (b) A man climbing st...
(a) Following are the factors on which the gravitational potential energy of a body depend on: (i) mass of the body (ii) height at which the body...
Storing of water in the reservoir is an example of a body which possess energy even when it is not in motion. The energy stored by this water is known...
Force, F = 2.5 × 1010 N Velocity, v = 5 m/s Time, t = 2 minutes = 120 s Distance, s = vt = 600m Work done, W = Fs = 15 × 1012 J
Force, F = 1 N Distance, s = 1 m Work done, W = Fs = 1 J
Mass of the body, m = 2 kg Initial velocity, u = 20 m/s Acceleration due to gravity, g = 10 m/s2 Height reached = h Time, t = 2 s Using ...
Mas of the box, m = 150 kg PE = 7350 J Acceleration due to gravity, g = 9.8 m/s2 PE = mgh h = h = 5m
Work done by a force applied on a body is: (a) When the direction of motion of the body and the force acting in the same direction, work done is po...