Work, Power and Energy

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 calculated using the formula: Work (W) = Force (F) × Distance (d).

Front

What is the formula for calculating Power?

Back

Power is defined as the rate at which work is done or energy is transferred. It is calculated using the formula: Power (P) = Work (W) / Time (t).

Front

What is Energy?

Back

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

Front

What is Kinetic Energy?

Back

Kinetic Energy is the energy possessed by an object due to its motion. It is 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. For gravitational potential energy, it is calculated using the formula: PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

How do you calculate the work done by a force?

Back

Work done by a force can be calculated using the formula: Work (W) = Force (F) × Distance (d) × cos(θ), where θ is the angle between the force and the direction of motion.

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 unit of Work?

Back

The unit of Work is the Joule (J), which is defined as one Newton meter (1 J = 1 N·m).

Front

What is the unit of Power?

Back

The unit of Power is the Watt (W), which is defined as one Joule per second (1 W = 1 J/s).

Front

If a force of 50 N moves an object 3 m, how much work is done?

Back

Work = Force × Distance = 50 N × 3 m = 150 J.