Work and Energy

Front

What is the formula for kinetic energy?

Back

Kinetic energy (KE) is given by the formula KE = 1/2 mv², where m is mass and v is velocity.

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

How is work defined in physics?

Back

Work is defined as the product of force and the distance over which it acts, expressed as W = Fd, where W is work, F is force, and d is distance.

Front

What is gravitational potential energy?

Back

Gravitational potential energy (PE) is the energy an object possesses due to its position in a gravitational field, calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

What factors affect gravitational potential energy?

Back

Gravitational potential energy depends on the height and mass of the object.

Front

What is the unit of work in the International System of Units (SI)?

Back

The unit of work in the SI system is the joule (J).

Front

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

Back

Work done can be calculated using the formula W = Fd 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; specifically, work can transfer energy to or from an object.

Front

What is the difference between kinetic energy and potential energy?

Back

Kinetic energy is the energy of motion, while potential energy is stored energy based on an object's position or state.

Front

What is the work-energy theorem?

Back

The work-energy theorem states that the work done on an object is equal to the change in its kinetic energy.