Exploring Work, Energy, and Power

What is the formula for kinetic energy?

• KE = 0.5 * m * v^2

• KE = m * v

• KE = 0.5 * m * v

• KE = m * v^2 / 2

How does potential energy differ from kinetic energy?

• Potential energy is the energy of motion while kinetic energy is stored energy.

• Potential energy is always greater than kinetic energy.

• Kinetic energy is stored energy based on position.

• Potential energy is stored energy based on position; kinetic energy is energy of motion.

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

• watt

• volt

• calorie

• joule

Explain the work-energy theorem in your own words.

• The work-energy theorem only applies to objects at rest.

• The work-energy theorem states that energy cannot be created or destroyed.

• The work-energy theorem relates the work done on an object to its change in kinetic energy.

• The work-energy theorem describes the relationship between potential energy and temperature.

If a car is moving at a speed of 20 m/s and has a mass of 1000 kg, what is its kinetic energy?

• 150000 J

• 10000 J

• 500000 J

• 200000 J

What factors affect gravitational potential energy?

• Temperature, pressure, and volume.

• Mass, height, and gravitational field strength.

• Color, shape, and texture.

• Speed, distance, and time.

How is work defined in physics?

• Work is defined as the product of force and distance in the direction of the force.

• Work is the force applied over time.

• Work is the total energy of an object.

• Work is defined as the change in momentum of an object.

Calculate the work done if a force of 50 N moves an object 4 meters in the direction of the force.

• 150 J

• 100 J

• 250 J

• 200 J

What is the relationship between work and energy?

• Energy can exist without work.

• Work is the transfer of energy.

• Work is a form of energy storage.

• Work is the same as energy.

If a 2 kg object is lifted to a height of 5 meters, what is its potential energy?

• 50 Joules

• 75 Joules

• 98.1 Joules

• 120 Joules