Work and power

What is the SI unit for Work?

• Newton

• Joule

• Watt

• kilogram

What is the SI unit of Power?

• Joule

• Newton

• Watt

• m/s²

If 10 N of force is used to move an object 0 m how much work is done

• 0 j

• 10 j

• 15 m

• 10 m

Two factors that determine work are

• amount of the force, and effort used
• amount of the force, and type of force
• mass, and distance
• amount of force and distance moved

If the amount of work was 10 joules and the force was 2.5 N what was the distance moved in meters.

• 4 meters

• 10 meters

• 2.5 meters

• 6 meters

In which of the following situations do your arms do work on books?

• holding a heavy stack of books while standing
• carrying a heavy stack of books
• dropping a stack of books onto a table
• picking up a pile of books from the floor

True or False: As a man pushes a refrigerator up a ramp, work is done.

• True
• False

How much power is used if a force of 35 newtons is used to push a box a distance of 10 meters in 5 seconds?

• 70 watts

• 1750 watts

• 1750 Joules

• 70 Newtons

You push against the back of your friends car that is stuck. You push and be become very tired. Did you do work?

• Yes, work was done
• No, work wasn't done

Tags

NGSS.HS-PS2-1

Force is measured using which type of unit?

• Meters
• Kilograms
• Newtons
• Joules