Simple Machines

What simple machine can be used to split things apart and also it can hold open a door?

• Lever
• Pulley
• Wedge
• Screw

What simple machine holds things together?

• Wedge
• Screw
• Lever
• Pulley

What simple machine has a fulcrum and can be used to lift a weight?

• Pulley
• lever
• screw
• wedge

What simple machine has a wheel with a groove on it that keeps a rope in place?

• pulley
• lever
  lever
• screw
  wedge
• wedge
  screw

Which simple machine doesn't move and a heavy object can be rolled or pushed up this machine?

• wheel and axle
• inclined plane
• wedge
• screw

The unit of measure for work is_____________.

• meters

• joules

• newtons

• millibars

The unit of measure for force is _____________

• meters

• joules

• miles per hour

• newtons

Work is done when .....

• a force is exerted on an object.

• an object exerts force onto another object.

• a force is exerted on an object causing the object to move.

• an object does not move.

True or False. When a force is applied to an object and it does not move then work was done.

• True

• False

A boy uses this simple machine to lift a load. How does this machine help the boy to do work?

• by changing the direction

• by reducing total work

• by decreasing distance

• by reducing effort force