Forces Review PS3.1 & 3.2

Which electric motor will turn the coil the fastest?

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NGSS.MS-PS2-3

Which force diagram best represents an object that is moving to the right?

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NGSS.MS-PS2-5

Which arrangement of a magnetic toy car and a magnet shows the largest force between the objects?

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Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS2-3

NGSS.MS-PS2-5

A student tests a model generator by using a voltmeter to measure electricity production. The student changes the size of the copper coil and the strength of the magnet in the generator. Which design will allow the generator to produce the most electricity?

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NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

Which next step will allow the student to test a variable that changes the speed of the motor's rotation?

• Reverse the magnets, and repeat steps 1-5.

• Replace the 1 V battery with a 3 V battery and repeat steps 1-5.

• Wind the wire in the opposite direction and repeat steps 1-5.

• Increase the distance of the motor from the ground and repeat steps 1-5.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A group of students conduct an experiment, where they build a tower using drinking straws and add metal weights to the tower until the tower breaks. The students need to explain why the metal weights cause the tower to break. Which statement best describes the force that causes the metal weights to break the tower?

• The force is gravity and is a noncontact force between the weights and Earth.

• The force is gravity and is a contact force between the weights and the tower.

• The force is magnetic and is a noncontact force between the weights and Earth.

• The force is magnetic and is a contact force between the weights and the tower.

Tags

NGSS.MS-PS2-4

How does the train stay elevated above the tracts?

• the force of attraction between the electromagnets

• the force of repulsion between the electromagnets

• the pull of gravity on the train

• the push of gravity on the train

Tags

NGSS.MS-PS2-5

How does the student's device model a generator?

• When the coil is held still between the magnetic poles, a current is produced in the coil to power the light bulb.

  
  

• When the coil moves between the magnetic poles, a current is produced in the coil to power the light bulb.

  
  

• When the coil rotates between the magnetic poles, it creates a magnetic field to produce electric current to power the light bulb.

  
  

• When the coil is placed between the magnetic poles, the magnets behave like a battery to power the light bulb.

  
  

Tags

NGSS.MS-PS3-5

Which type of noncontact force involves the movement of energy through a circuit?

• electrical

• gravitational

• magnetic

• static

Tags

NGSS.MS-PS2-3