Exploring Work and Power Concepts

What is the key condition for work to be done on an object?

• The object must be stationary.

• The force must be perpendicular to the direction of motion.

• The force must be zero.

• The object must move in a direction parallel to the force.

How is work calculated when force and distance are given?

• Force divided by distance

• Force plus distance

• Force times distance

• Force minus distance

What is the unit of work?

• Joule

• Meter

• Newton

• Watt

Tags

NGSS.HS-PS2-1

If a 20 Newton force moves a cart 3.5 meters, how much work is done?

• 35 Joules

• 7 Joules

• 700 Joules

• 70 Joules

What is the relationship between force and work?

• They are not related.

• They are directly proportional.

• They are equal.

• They are inversely proportional.

What is power defined as?

• The force applied divided by the time.

• The amount of work done divided by the time.

• The distance moved divided by the time.

• The amount of work done divided by the distance.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What is the unit of power?

• Meter

• Watt

• Joule

• Newton

If you do the same amount of work in less time, what happens to the power?

• It decreases.

• It remains the same.

• It increases.

• It becomes zero.

How much power is expended if a force of 1 Newton moves a book 2 meters in 1 second?

• 4 Watts

• 1 Watt

• 2 Watts

• 0.5 Watts

If a 20 Newton force moves an object 3.5 meters in 0.5 seconds, how much power is expended?

• 280 Watts

• 35 Watts

• 70 Watts

• 140 Watts