Average and Instantaneous Power Example

The video tutorial explores the calculation of power delivered by gravity to a pumpkin dropped from a height. It covers the setup of equations for power, differentiating between average and instantaneous power, and solving for these values at different points during the fall. The tutorial concludes with a suggestion to graph the results in a future session.

What is the initial velocity of the pumpkin when it is dropped from the window?

• 9.81 m/s

• 8.91 m/s

• 0 m/s

• 8.53 m/s

Which equation is used to calculate the average power delivered by gravity?

• Power = Mass x Acceleration

• Power = Velocity x Time

• Power = Work / Time

• Power = Force x Displacement

How is the change in time calculated for the pumpkin's fall?

• Using the final velocity and mass

• Using the displacement and acceleration

• Using the initial velocity and displacement

• Using the force and acceleration

What is the average power delivered by gravity to the pumpkin during its fall?

• 746 watts

• 1110 watts

• 1.48 horsepower

• 553 watts

What is the instantaneous power delivered by gravity right after the pumpkin is dropped?

• 553 watts

• 1110 watts

• 1.48 horsepower

• 0 watts

Which equation is used to find instantaneous power at a specific time?

• Power = Force x Velocity x cos(theta)

• Power = Displacement / Time

• Power = Work / Time

• Power = Mass x Acceleration

What is the final velocity of the pumpkin just before it hits the ground?

• 8.91 m/s

• 9.81 m/s

• 13.22 m/s

• 0 m/s

How much power is delivered by gravity to the pumpkin just before it strikes the ground?

• 746 watts

• 1.48 horsepower

• 1110 watts

• 553 watts

What is the equivalent horsepower of the power delivered by gravity just before the pumpkin hits the ground?

• 1.00 horsepower

• 1.48 horsepower

• 0.75 horsepower

• 2.00 horsepower

What is suggested as a next step to better understand the power delivered by gravity?

• Conducting an experiment

• Graphing the results

• Calculating more examples

• Writing a report