Energy, Work and Power 2

Open Ended

How does changing the height affect gravitational potential energy?

Open Ended

Why do you think velocity is squared in the kinetic energy equation?

Open Ended

Can you think of a situation where force doesn't result in work?

Multiple Choice

If the amount of work done remains constant, what happens to the power if the time taken is doubled?

• Power is doubled

• Power is halved

• Power remains the same

• Power is reduced to zero

Open Ended

How would the kinetic energy of the car change if its speed was doubled?

Multiple Choice

Which of the following equations is used to calculate power?

• P = W/t

• E = ½mv²

• W = F·s

• E = mgh

Multiple Choice

Which of the following equations correctly represents the work done by a force?

• W = F · S · cosθ

• K = 1/2 mv^2

• U_gravitational = mgh

• P_av = ΔW/Δt

Open Ended

Reflecting on today's session about energy, work, and power, what is one real-world example where you could apply these equations to solve a problem?