100 J
100 j
potential energy
The coaster have a large amount of potential energy when it gain height, kinetic energy when it gain speed instead.
You gain Potential Energy as you cycle up a hill.
It doesn't gain any potential by BEING up there, but it does during theprocess of being lifted up to there from the ground.W = m g hHere m = 1.5 kgg = 9.8 m/s^2and h = 2 mSo work performed = 29.4 JHence potential energy gained = 29.4 joule
39.2 joules of potential energy.
If Gravitational potential energy = weight X height, then the book should gain 4joules
Your gravitational potential energy would increase in this case. Of course, this comes at the cost of another type of energy; in this case, chemical energy stored in your body, from the food you ate.
From what I understand: PE - Potential Energy (mgh) KE - Kinetic Energy (1/2 mv2) If one dismisses the friction with air (conservation of energy), a loss of 7 joules for potential energy means a gain of 7 Joules in kinetic energy.
By using chemicals in a rocket engine to raise a vehicle high above the earth's surface, the vehicle will gain gravitational potential energy. It will also gain kinetic energy, depending on what trajectory it follows
Sure, you can add energy to an object. For example, you can heat an object up (to have it gain heat energy), you can raise it (to have it gain gravitational potential energy), or you can make it move (to have it gain kinetic energy). In each case, the energy has to come from somewhere.
There is more than one kind of potential energy. A rocket, when fueled, has chemical potential energy. When it burns its fuel, it loses chemical potential energy but gains gravitational potential energy. If it then falls back to the ground it loses gravitational potential energy but gains in heat and kinetic energy, until it burns up or crashes.