Work, Energy, and Power

Front

What is Work in physics?

Back

Work is defined as the product of the force applied to an object and the distance over which that force is applied, in the direction of the force. It is measured in joules (J).

Front

What is the formula for calculating Work?

Back

Work (W) = Force (F) × Distance (d) × cos(θ), where θ is the angle between the force and the direction of motion.

Front

What is Energy?

Back

Energy is the capacity to do work. It exists in various forms, including kinetic energy, potential energy, thermal energy, etc.

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 stored energy of an object due to its position or state. For gravitational potential energy, it is calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

What is Power in physics?

Back

Power is the rate at which work is done or energy is transferred, measured in watts (W).

Front

What is the formula for calculating Power?

Back

Power (P) = Work (W) / Time (t).

Front

How does lifting an object affect its potential energy?

Back

Lifting an object increases its height, which increases its gravitational potential energy.

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 significance of the angle in the work formula?

Back

The angle (θ) in the work formula determines how much of the force contributes to the work done. If θ is 0°, all the force contributes to work; if θ is 90°, no work is done.