motion forces and energy

It is a matter of common experience that a fast moving stone can break a windowpane, falling water can rotate turbines and moving air can rotate windmills and propel sailboats. In all these examples, the moving body possesses energy. Work is done by the body in motion. Thi..

We know that work has to be done in order to bring a molecule, from interior to the surface, against the force of cohesion. If the surface area is increased, more molecules can be accommodated at the surface. Increase in surface area, results in cooling. To maintain the temperature, heat ..

We know that work has to be done in order to bring a molecule, from interior to the surface, against the force of cohesion. If the surface area is increased, more molecules can be accommodated at the surface. Increase in surface area, results in cooling. To maintain the temperature,..

The forces on the space-shuttle are similar to the forces in a collision between two tennis balls. When the balls collide, they are propelled in opposite directions. The rockets of the space-shuttle force burning gases downward through the exhaust vents. In response t..

Introduction - We have learnt that a force changes or tends to change the state of rest, speed or direction of motion of an object, i.e., the force produces an acceleration. In this chapter, we are going to identify one of the forces which produces accelerati..

Energy in SHM - To cause a displacement of a body controlled by elastic forces, work has to be done. For example, work has to be done in stretching a spring against the elastic forces. This work will be stored in the body as potential energy. When the deformi..

Notice when the diver jumps down on a diving board. The board springs back and forces the diver into the air. The action force exerted on the board by the diver causes a reaction force by the board equal and opposite to the force exerted by the diving board...

The figures show a block of wood on a table. When the block is pulled at point A, it begins to move towards the left and if the block is pulled at the point B it moves towards the right. Example of Balanced Forces In a game of tug of war when both the teams pull the rope with equal and op..

. A second borehole is then drilled into the cracked rocks. Water is pumped down the first hole and forced through the cracks. The water gets heated and returns through the other hole as hot water. This energy equals to that stored in 10,000 million tones of coal. In some parts ..

Hydro Energy - Water, being a vital resource for all living beings, is also an important source of energy. Hydropower supplies 6% of the world's energy needs. Moving water is highly energized. A hand held into a fast flowing stream can feel the pressure of water trying..