Simple Machine Test Review

How does using a pulley to lift an object increase mechanical advantage?

• by decreasing the mass of the object being lifted

• by increasing the mass of the object being lifted

• by increasing the amount of force needed to lift an object

• by decreasing the amount of force needed to lift the object

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The diagram shows a lever.

Which statement is true?

• Energy transfer must equal the load.

• Energy transfer must be more than the load.

• Load must be larger than the energy transfer.

• No relationship exists between the energy transfer and the load.

Tags

NGSS.MS-PS3-5

This is a diagram of just four simple machines.

Which simple machine would most likely be used to move an object over great distances and on a flat surface?

• R

• S

• T

• U

The diagram shows a man using a lever to move a rock.

Which change can they make to the fulcrum, to decrease the force he has to apply?

• remove the fulcrum

• put the fulcrum on top of the lever

• move the fulcrum closer to themselves

• Move the fulcrum closer to the rock

Tags

NGSS.MS-ETS1-1

How do simple machines make it easier to move an object?

• They multiply the resistance to the applied force on the object.

• They maintain the direction in which the force is applied on the object.

• They increase the amount of force that needs to be exerted on the object.

• They decrease the amount of force that needs to be exerted on the object.

Tags

NGSS.MS-ETS1-1

Which action increases a machine's efficiency?

• increasing the amount of work

• increasing the amount of friction

• decreasing the amount of friction

• decreasing the amount of work

Tags

NGSS.MS-ETS1-2

which simple machine helps raise and lower a flag on a flagpole?

• Pulley

• Wedge

• Lever

• Inclined plane

What is the best way to increase the mechanical advantage of a lever?

• using a larger fulcrum

• moving the fulcrum closer to the load

• moving the fulcrum closer to the effort

• placing the fulcrum in the middle of the machine

Tags

NGSS.MS-PS2-2

The height of an inclined plane is 5 meters (m) and the length of the slope is 20 meters (m).

What is the mechanical advantage of this simple machine.

Mechanical Advantage (MA) = length of the slope / height of the slope

• 0.25

• 4

• 20

• 100

Tags

NGSS.MS-PS2-2

This diagram show a hand-can opener which is a compound machine.

What three simple machines does it contain?

• lever, screw, pulley

• screw, wedge,

  inclined plan

• wedge, lever,

  wheel & axle

• pulley, wedge,

  wheel & axle

Tags

NGSS.MS-ETS1-2