Work And Energy Review

Front

What is the definition of work in physics?

Back

Work is defined as the transfer of energy that occurs when a force is applied to an object and the object moves in the direction of the force.

Front

What is the formula for calculating work?

Back

Work (W) = Force (F) x Distance (d) x 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 an object possesses due to its motion, calculated using the formula KE = 1/2 mv².

Front

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

Back

The unit of energy is the Joule (J).

Front

What is gravitational potential energy?

Back

Gravitational potential energy is the energy an object possesses due to its position in a gravitational field, calculated using the formula PE = mgh.

Front

What does the law of conservation of energy state?

Back

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

Front

How do you calculate the kinetic energy of a 4 kg object moving at 3 m/s?

Back

KE = 1/2 mv² = 1/2 (4 kg)(3 m/s)² = 18 J.

Front

What is the relationship between work and energy?

Back

Work is a means of transferring energy from one system to another.

Front

Can energy be transformed from one form to another?

Back

Yes, energy can be transformed from one form to another, such as from potential energy to kinetic energy.

Front

What is the formula for gravitational potential energy?

Back

PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.