Simple Machines, Work & Power Remediation

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

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

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 is made up of two parts and can be found on bikes, wagons and wheelbarrows?

• wheel and axle
• inclined plane
• lever
• 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

Tags

NGSS.MS-PS2-4

Which of the following is work according to the scientific definition?

• pushing a box across the floor
• standing still while holding something heavy
• walking with a backpack on
• all of these are considered "work"

Tags

NGSS.MS-PS3-5

Using 10 N of force to move a box 2 m,
= how much work?

• 0 (zero) J
• 20 J
• 12 J
• 8 J

Tags

NGSS.MS-PS3-5

Device that makes work easier by changing the size or direction of the force  (or both) is called a

• simple machine
• spring scale
• newton
• pulley

Simple machines make work easier by 

• increasing the energy needed to do the work, while reducing friction.
• changing the size or direction of the force, or both
• reducing work
• simple machines do all of these

Tags

NGSS.MS-PS2-1

NGSS.MS-PS3-5