Work 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. Formula: W = F × d × cos(θ).

Front

What is Kinetic Energy?

Back

Kinetic Energy (KE) is the energy an object possesses 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 (PE) is the energy stored in an object due to its position or configuration. For gravitational potential energy, it is calculated as PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.

Front

How does the Law of Conservation of Energy apply to Work and Energy?

Back

The Law of Conservation of Energy states that energy cannot be created or destroyed, only transformed from one form to another. In a closed system, the total energy remains constant.

Front

What happens to Potential Energy and Kinetic Energy in a pendulum?

Back

As a pendulum swings, its potential energy decreases while its kinetic energy increases as it moves from the highest to the lowest point.

Front

How do you calculate Work done when a force is applied at an angle?

Back

Work done (W) can be calculated using the formula W = F × d × cos(θ), where F is the force applied, d is the distance moved, and θ is the angle between the force and the direction of motion.

Front

What is the relationship between velocity and Kinetic Energy?

Back

Kinetic Energy increases with the square of the velocity. If velocity triples, the Kinetic Energy increases by a factor of nine (9).

Front

How do you calculate Gravitational Potential Energy?

Back

Gravitational Potential Energy (PE) can be calculated using the formula PE = mgh, where m is mass, g is the acceleration due to gravity (9.8 m/s²), and h is height.

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 the unit of Energy?

Back

The unit of Energy is also the Joule (J).