B-2 Physics Dynamics Quiz

The rate at which work is done.

The ability to do work.

Stored energy due to an object's position or condition.

Energy possessed by an object due to its motion.

The sum of potential and kinetic energy.

The equation for power.

Energy can neither be created nor destroyed, only transformed from one form to another.

The SI unit of energy.

A natural force that pulls objects towards each other. Its strength depends on the mass of the objects and the distance between them.

The force exerted by Earth's gravity on an object.

The amount of matter in an object. It doesn't change regardless of location.

The acceleration caused by Earth's gravity on a freely falling object. It's approximately 9.8 m/s².

The force that opposes motion between two surfaces in contact.

The tendency of an object to resist changes in its motion.

The product of an object's mass and its velocity; a measure of motion.

The force of attraction between any two objects with mass. The more massive the objects, the greater the force.

The act of applying force over a distance to move an object. It is calculated by multiplying force by distance.

A measure of how much friction exists between two surfaces. It represents the ratio of the frictional force to the normal force.

The energy associated with the motion of atoms and molecules within a substance. It is a form of energy that can be transferred between objects.

The transformation of one form of energy into another, such as chemical energy into heat energy during combustion.

A measure of how effectively a machine converts input energy into useful output energy. It is the ratio of work output to work input.

A hypothetical machine that could produce more energy than it consumes, violating the law of conservation of energy.

The process of converting chemical energy stored in fuels into heat and light energy.

A simple machine, such as a lever, pulley, or gear train, that uses mechanical advantage to amplify force or change direction.

The energy an object possesses by virtue of its position or configuration. In the given example, this is the energy stored by the mass before it falls.

The energy an object possesses due to its motion. In the given example, this is the energy the mass gains as it falls.

The resistance to motion between two surfaces in contact, resulting in a loss of energy.

The force opposing motion between two surfaces, one or both of which is rolling. It is generally less than sliding friction.

The energy released by burning fossil fuels, particularly petrol. This energy is a non-renewable resource, meaning it cannot be replenished at the rate it is being used up.

Linear momentum is a measure of a moving body's tendency to keep moving in a straight line. It's calculated by multiplying the body's mass by its velocity (M = mv).

Angular momentum is a measure of how much a rotating object tends to keep spinning. It's related to the object's rotational inertia and speed.

A device that uses the principle of angular momentum to maintain a constant speed, like a spinning top. It helps keep pumps, propellers, and other rotating devices running smoothly.

Impulse is the change in momentum of a body when a force acts on it for a certain time. It's calculated by multiplying the force by the time the force is applied (I = Ft).

A rotating mass (rotor) mounted on gimbals, which allows it to rotate freely in any direction. It's used in various applications like compasses, stabilization devices, and even toys.