Force Fields & PE

Students investigate changes in gravitational potential energy using paper clips, crumpled paper and shelves. They measure the masses of three paper clips and paper. They determine that the piece of paper has 3 times the mass of the three paper clips. They then place the objects on the floor, beneath the shelves. Determine the placement of the three paper clips and crumpled paper on the shelves so that both have equal gravitational potential energy.

• Three paperclips & the crumpled paper on the 1 meter shelf

• Three paperclips on the 1 meter shelf & the crumpled paper on the 3 meter shelf.

• Three paperclips on the 3 meter shelf & the crumpled paper on the 1 meter shelf.

• Three paperclips & the crumpled paper on the 3 meter shelf

Tags

NGSS.MS-PS3-2

One bar magnet sits on a table, and a rubber band suspends another magnet above it. In the view on the left, the upper magnet is held in place and cannot move. In the view on the right, the upper magnet has been released.

How did the potential energy change when the upper magnet was released? (SELECT ALL THAT APPLY)

• Gravitational PE decreases

• Elastic PE decreases

• Magnetic PE decreases

• Magnetic PE increases

• Elastic PE increases

Tags

NGSS.MS-PS2-3

NGSS.MS-PS3-2

Two positive charges are held far apart within each other's force field. Which statements are TRUE? SELECT ALL THAT APPLY.

• The charges will repel when released

• The charges will attract when released

• The charges have high PE before being released

• The charges have low PE before being released

Tags

NGSS.MS-PS2-3

NGSS.MS-PS3-2

NGSS.MS-PS2-1

NGSS.MS-PS2-2

WHEN YOU DROP A TENNIS BALL FROM 3 METERS ABOVE THE EARTH’S SURFACE, WHAT HAPPENS TO THE GRAVITATIONAL POTENTIAL ENERGY AS THE TENNIS BALL FALLS?

• PE decreases

• PE increases

Tags

NGSS.MS-PS3-2

Two opposite charges are held far apart within each other's force field. Which statements are TRUE? SELECT ALL THAT APPLY.

• The charges will repel when released

• The charges will attract when released

• The charges have high PE before being released

• The charges have low PE before being released

Tags

NGSS.MS-PS2-5

NGSS.MS-PS3-2

Two positively charged particles are attached to springs that are capable of stretching and compressing. A metal sphere is placed near each charged particle, as shown in the diagram.

A positive charge is slowly added to Sphere A. An equal amount of negative charge is slowly added to Sphere B. Assume that the two systems are isolated from each other.

How does the elastic potential energy change for each spring?

• Both springs increase in PE

• Spring A increases; Spring B decreases

• Spring A decreases; Spring B increases

• Both springs decrease in PE

Tags

NGSS.MS-PS2-3

The diagram to the right shows the placement of four bar magnets within the magnetic field of a larger bar magnet. Which bar magnet will experience the greatest magnetic attraction?

• Magnet 1

• Magnet 2

• Magnet 3

• Magnet 4

Tags

NGSS.MS-PS2-3

What could the gravitational force be for object 2?

• 3,600 N

• 5,500 N

• 9,450 N

• 12,750 N

• 16,300 N

Tags

NGSS.MS-PS2-5

What could the gravitational force be for object 4?

• 3,600 N

• 5,500 N

• 9,450 N

• 12,750 N

• 16,300 N

Tags

NGSS.MS-PS2-5

NGSS.MS-PS2-4

Three balls with masses of 16.8 g, 36.3 g, and 44.1 g are all sitting on the ground. Which statement is true?

• The 44.1 g ball has the most GPE

• The 16.8 g ball has the most GPE

• All three balls have no GPE

Tags

NGSS.MS-PS2-4