Lesson: Work, Power, Kinetic and Potential Energy

Work and Power

Multiple Choice

What is the Scientific Defintion for Work?

• Joules

• A force (push or pull) that is applied to an object that causes it tp be displaced

• The amout of energy that is stored in an object due to the gravational pull of an heavier object.

• The rate at which energy is transferred or converted

Multiple Choice

8. Work is defined as:

• The product of force and displacement.

• The rate of doing work

• The energy stored in an object.

• W=F/d

Multiple Choice

Power is defined as:

• The force applied to an object

• The rate of doing work

• The product of force and displacement.

• The energy stored in an object.

Multiple Choice

Which of the following scenarios represents the highest power output?

• Lifting a 100 kg weight 1 meter in 20 seconds

• Lifting a 10 kg weight 2 meter in 5 seconds

• Lifting a 1000 kg weight 2 meter in 20 seconds

• Lifting a 1000 kg weight 2 meter in 200 seconds

Multiple Choice

A 50 kg person climbs a flight of stairs in 20 seconds, covering a vertical distance of 5 meters. Calculate their power output.

• 1000 Watts

• 250 Watts

• 125 Watts

• 5000 Watts

Multiple Choice

A light bulb consumes 60 watts of power. How much energy does it consume in 1 hour?

• 60 Watts

• 360 Watts

• 125 Watts

• 216,000 Watts

Multiple Choice

If a toaster uses 800 watts of power, what is its power output in horsepower?

• 1.07 hp

• 800 hp

• 745.7 hp

Multiple Choice

If a toaster uses 800 watts of power, what is its power output in horsepower?

• 1.07 hp

• 800 hp

• 745.7 hp

Multiple Choice

Which of the following best describes kinetic energy?

• Energy associated with the motion of an object.

• Energy due to an object's mass and height above the ground.

• Energy stored in an object due to its position or configuration.