PLTW

If the small gear is driving the large gear, what is happening to the torque?

• Torque is increasing

• Torque is decreasing

• Torque remains constant

• Not enough information to answer the question

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The image shown is a vice grip.  When the lever is rotated, the grips move towards each other.  What are the input and output motions?

• input=linear
  output=linear

• input=linear
  output=reciprocating

• Input=rotary
  output=rotary

• Input=rotary
  Output=linear

Tags

NGSS.MS-PS2-1

What happens to the torque in this mechanism?

• Increases

• Decreases

• Remains Constant

What happens to the speed in this mechanism?

• Increases

• Decreases

• Remains Constant

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

What is the gear ratio of these meshed gears if the input gear has 36 teeth?

• 36:60

• 60:36

• 3:5

• 5:3

Tags

NGSS.MS-PS2-1

What is the name of this mechanism?

• Simple Gear Train

• Gear Train with Idler

• Worm and Wheel

• Rack and Pinion

A box of weight W is lifted by a force F using a lever as shown below.

What is the mechanical advantage of the lever (MA=Input Distance/Output Distance)?

• 0.5

• 2

• 3

• 6

Tags

NGSS.MS-PS2-1

Jeff is a landscaping contractor and lifts a rock weighing 600 pounds by wedging a board under the rock. Jeff weighs 150 pounds and puts all of his weight on the lever. How much mechanical advantage did the lever provide to Jeff in lifting the rock?

• 0

• 2

• 4

• 8

Tags

NGSS.MS-ETS1-1

What does PLTW stand for in the context of science education?

• Project Lead The Way

• Physics Learning Through Work

• Practical Learning and Teaching Workshop

• Programmed Learning and Teaching Way

Which of the following is a key focus area of PLTW in science education?

• Engineering principles

• Historical analysis

• Literary criticism

• Artistic expression

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

NGSS.MS-ETS1-4