Simple Machines

The unit of measure for work is_____________.

• meters

• joules

• newtons

• millibars

Tags

NGSS.HS-PS3-2

The unit of measure for force is _____________

• meters

• joules

• miles per hour

• newtons

True or False. The formula for work is Work = Force x Distance (W= F x D).

• True

• False

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.

Tags

NGSS.HS-PS2-1

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

• True

• False

How much work was done when a force of 12 newtons was applied to an object and the object move 2 meters?

• 14 Joules

• 24 Joules

• 14 Newtons

• 24 Newtons

Tags

NGSS.MS-PS2-2

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

Tags

NGSS.MS-ETS1-1

A boy adds movable pulley to make a pulley system. What mechanical advantage does a movable pulley provide?

• it provides another wheel for the chain to sit on.

• it will change the direction faster than with 1 fixed pulley

• it will greatly reduce the force needed to lift the load

• it will cause the object to move in the same direction

Tags

NGSS.MS-PS3-2

Which model will require the least amount of force?

• pulley 1

• pulley 2

• pulley 3

• pulley 4

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

How can you increase the efficiency of a pulley?

• change its color

• apply oil to the wheels to help them spin better

• decrease the size of the wheels

• cover the wheels with a rough material

Tags

NGSS.MS-ETS1-1