Simple Machines

Robert is using an inclined plane to move a heavy box into a truck bed that is two meters off the ground. Which of the inclined planes should Robert use to get the greatest mechanical advantage?

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Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

A worker needs to load a heavy box onto a truck. The worker uses a ramp to move the box because the ramp

• increases the weight of the box

• reduces the gravitational force on the box

• increases the amount of friction on the box

• reduces the amount of force applied to the box

Tags

NGSS.MS-PS2-2

The ideal mechanical advantage (IMA) of an inclined plane that is 10 meters long and 2 meters high is 5. To increase the IMA of this inclined plane someone could increase the

• height of the inclined plane.

• length of the inclined plane.

• angle of the inclined plane.

• slope of the inclined plane.

Tags

NGSS.MS-PS2-2

The picture shows the inside of a watch. This watch uses both a battery and a simple machine to measure time. The arrow points to the simple machine inside the watch. What simple machine helps make the watch measure time?

• a wheel and axle

• an inclined plane

• a screw

• a lever

Tomas wants to paint his bedroom. He goes to the store and buys two cans of paint. Which simple machine would make it easier for him to open the cans?

• an inclined plane

• a wheel and axle

• a pulley

• a lever

A group of workers needs to move a piano from the second floor of a building. The piano is too wide to fit through the door, so they will lower the piano to the ground through a window. Which tool would be BEST to help the workers lower the piano from the window?

• wheel and axle

• inclined plane

• pulley

• wedge

Students used rulers as levers during an investigation on simple machines and forces. They made the arms of the levers different lengths by how they placed the ruler on the desk. They put a box on the end of the ruler. Which ruler would require the greatest force to be able to lift the box off the desk?

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Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The picture shows a pulley. How does a pulley help make work easier?

• It reduces friction.

• It redirects the force.

• It holds things together.

• It pushes materials apart.

Tags

NGSS.MS-ETS1-1

Leticia is trying to lift a box using the LEAST amount of force. Which first-class lever should she use?

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Tags

NGSS.MS-ETS1-1

Which simple machine uses a fulcrum to redirect a force?

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Tags

NGSS.MS-PS2-1