Work and Simple Machines

Whenever a force moves something it is called...

• Power

• Work

• Pressure

• Heat

A measure of how quickly work is being done is called...

• Force

• Work

• Energy

• Power

A boy does 18 J of work in 2.0 s on his backpack as he lifts it from a table. How much power is use on the backpack?

• 6 watts

• 7 watts

• 8 watts

• 9 watts

A student pushes a desk 2.0 m across the floor using a constant force of 25.0 N How much work does the student do on the desk?

• 50 watts

• 50 Newtons

• 50 Joules

• 50 Meters

Tags

NGSS.MS-PS3-5

What is a device that makes doing "work" easier?

• Telescope

• Thermometer

• Machine

• Machete

Tags

NGSS.MS-PS2-1

Which is an example of a wheel and axle?

• Can opener

• Screwdriver

• Nail

• Scissors

Two or more simple machines that operate together form what?

• A compound machine

• A replacement

• A reaction

• A simple machine

What is an example of a compound machine?

• Screwdriver

• Scissors

• Can opener

• Hammer

A boy kicks a ball with 10 N of force. The ball moves 7.0 m across the floor. How much work was done?

• 69 J

• 72 J

• 70 J

• 78 J

Tags

NGSS.MS-PS3-4

The work done to lift an object is...

• Weight x Distance

• Distance x Height

• Weight x Length

• Length x Distance

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-4