Ch.6: Work, Energy, and Power

What is the definition of work in physics?

• Measuring the temperature of a system

• Solving equations in physics

• Writing reports in a physics lab

• Applying force over a distance to a system

What is the relationship between work and energy in physics?

• Work is the ability to do energy

• Energy is the ability to do work

• Work and energy are unrelated

• Energy is the force applied over distance

What is the unit of work in physics?

• Watts

• Meters

• Joules

• Newtons

What is the formula for calculating kinetic energy?

• Mass * acceleration

• 1/2 * mass * velocity^2

• Mass * velocity

• Force * distance

What is the formula for calculating gravitational potential energy?

• Mass * gravity * height

• Force * distance

• Mass * velocity

• Mass * acceleration

What is the equation for spring potential energy?

• k * distance^2

• 1/2 * k * distance^2

• k * distance

• 1/2 * k * distance

What is the equation or method for calculating work (select all that are true)?

• Work = force * distance

• Work = force / distance

• Work = force * distance * cosine(theta)

• Work = integration (area) of force as a function of distance

What is a non-conservative (non-isolated) system in physics?

• A system that has no energy

• A system that has constant energy

• A system that may lose energy through work

• A system that only gains energy through work

What is the unit of average power in physics?

• Watts

• Meters

• Joules

• Newtons

What is the formula for average power in physics?

• Energy / time

• Mass * velocity

• Force * distance

• Work / time