Eric twists the cap to open the gallon of milk.  Which type of simple machine is the milk cap?

• Screw
• Lever
• Wedge
• All of the Above

Emma uses the stairs to get to the second floor of the 300 building. What type of simple machine are the stairs?

• Wedge
• Inclined Plane
• Pulley
• Above

Tyra uses the object below to hold two boards together.  Which type of simple machine is the object?

• Wedge
• Inclined Plane
• pulley
• Screw

Tags

NGSS.MS-ETS1-2

Which type of simple machine is a zipper?

• Lever
• Wedge
• Pulley
• None of the Above

A wheelbarrow is a compound machine. It is made up of more than one simple machine. What type of simple machine are the handles of the wheelbarrow?

• Lever
• Wedge
• Inclined Plane
• None of the Above

An object being lifted or moved by a machine is a:

• Fulcrum
• Load
• Friction
• Force

Tags

NGSS.MS-ETS1-1

Comparing load/effort is called ?

• mechanical efficiency
• force
• mechanical advantage
• friction

Joey's little brother makes a ramp to push his toy dump truck up to his sandbox. If he uses 5 N of force to push the 12 N truck up the ramp, what is the mechanical advantage of his ramp?

• 6.0
• 0.42
• 2.4
• 23.5

Caleb wants to create a block and tackle pulley system that lift a 500 kg weight when a 100 N force is applied. How many segments of rope should be attached to the block and tackle?

• 3
• 4
• 5
• 6

Tags

NGSS.MS-ETS1-1

NGSS.MS-PS2-2

In a lever (all classes of levers) the force needed will be smaller and the work will be easier if we do the following

• Move the load closer to the fulcrum
• Move the load away from the fulcrum
• The distance from the fulcrum does not matter
• None of the Above