PLTW

What is the mechanical advantage of the block and tackle used to lift the bale of cotton?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS2-2

This 2000 N weight is raised 1 meter by pulling 4 meters of rope. What force was required to pull the rope?

• 500 N

• 1000 N

• 2000 N

• 8000 N

Tags

NGSS.MS-PS2-2

This pulley

• has a mechanical advantage of 1 and does not make work easier.

• has mechanical advantage of 2 and reduces the force needed to lift an object.

• has a mechanical advantage of 2 and changes the direction of the applied force.

• has a mechanical advantage of 1 and changes the direction of the force needed to lift an object.

Tags

NGSS.MS-PS2-2

If the weight of the block is 10N, how much force does one have to apply to lift it using this pulley (MA=2)?

• 2N

• 5N

• 10N

• 15N

Tags

NGSS.MS-PS2-2

What is the mechanical advantage of this pulley system?

• 2

• 3

• 4

• 5

The mechanical advantage of this inclined plane is...(MA=Resistance Force/Effort Force)

• 2.4

• 3.4

• 4.4

In this illustration,

• the machine is decreasing mechanical advantage

• the machine is increasing mechanical advantage

• mechanical advantage is not changed

To increase the mechanical advantage of a lever

• make sure the fulcrum is in the middle of the lever

• move the fulcrum closer to the load

• move the fulcrum closer to the effort

• use a bigger fulcrum

Tags

NGSS.MS-PS2-1

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

• Political science

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

NGSS.MS-ETS1-4

NGSS.MS-PS3-3