Work Power & Machines

units of force are

• newtons

• grams

• joules

• meters

units for work are

• newtons

• joules

• meters

• seconds

What is the formula for work?

• Force = work x distance
• Distance = force x work
• Work = force x distance
• Work = force x mass

Which is doing work?

• pushing a wall
• holding a box
• picking up a pencil
• sitting in a chair

Which is not considered a simple machine?

• The pump

• The wheel & axle

• The wedge

• The screw

• The pulley

An axe is an example of which simple machine?

• Pulley

• Wedge

• Screw

• Inclined plane

The unit for Power

• Watt

• Joule

• Newton

What two things do you need to know to calculate work?

• force and gravity
• distance and mass
• gravity and mass
• force and distance

The rate at which work is done is called ____________________ .

• Power
• Kinetic Energy
• Potential Energy
• Watts

Name the type of machine that is described: something that uses a rope and can change the direction of a force.

• Screw
• Wheel and axle
• Lever
• Pulley

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1