Work and Energy

Front

What is work in physics?

Back

Work is defined as the product of force and displacement in the direction of the force. It is calculated using the formula: Work = Force × Displacement.

Front

What is the unit of work?

Back

The unit of work is the Joule (J), which is equivalent to one Newton meter (N·m).

Front

What is energy?

Back

Energy is the ability to do work. It exists in various forms, including kinetic energy, potential energy, thermal energy, and more.

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in its energy. If work is done on an object, its energy increases; if work is done by the object, its energy decreases.

Front

What is the formula for calculating work?

Back

The formula for calculating work is: Work = Force × Distance × cos(θ), where θ is the angle between the force and the direction of motion.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object due to its motion, calculated using the formula: KE = 1/2 mv², where m is mass and v is velocity.

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or configuration, commonly calculated as: PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

What is the principle of conservation of energy?

Back

The principle of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What is power in relation to work?

Back

Power is the rate at which work is done or energy is transferred, calculated using the formula: Power = Work / Time.

Front

What is the unit of power?

Back

The unit of power is the Watt (W), which is equivalent to one Joule per second (J/s).