When a light switch is turned on, electrical energy runs through the wires and is transferred to the bulb where electrical energy is converted to light and heat energy. This is an example of energy transfer. When a bowling ball that has kinetic energy strikes the bowling pins which are stationary, energy is transferred from the ball to the pins, causing the pins to move.Know More
Energy can be neither created nor destroyed, according to the law of conservation of energy, but it can change from one form to another or transfer from one object to another. A rock placed on a tall cliff has potential energy due to the height at which it is placed. If the rock starts to fall, its potential energy is changed to kinetic energy since the rock traded in the height of its position for velocity of its movement.
Electrical energy is changed to kinetic energy when a fan is turned on. Chemical energy of food is changed to mechanical energy whenever organisms do work. Batteries convert chemical energy to electrical energy to power various devices. Electric generators convert the chemical energy of gasoline to kinetic energy to move a coil of wire relative to a magnet to generate electrical energy. When a stationary book on a table is pushed, energy from the person pushing it is transferred to the book, causing the book to move. When striking a drum, the kinetic energy of the stick changes to sound energy.Learn More
A toilet paper dispenser is an example of a wheel and axle. The rod that supports the roll of toilet paper serves as the axle, and the toilet paper roll serves as the wheel. Like all wheel and axle machines, the toilet paper rotates concentrically around the cylindrical holder, which is fastened in place.Full Answer >
Resistance to change in motion is called inertia. The amount of inertia in an object is directly proportional to its mass; an object with greater mass has more inertia than an object with less mass.Full Answer >
An object's gravitational potential energy is equal to the product of the object's mass times the gravitational field strength times its height (PEgrav = mass * gravity * height). The strength of Earth's gravitational field is 9.8 meters per second, and height is measured starting from a specified surface.Full Answer >
According to BBC, "mechanical motion" is defined as one of the four different motion types in mechanical systems. They are rotary motion, linear motion, reciprocating motion and oscillating motion.Full Answer >