Forces and Motion Review

What is gravity?

• A non-contact force

• Energy

• A contact force

• All of them

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If iron filings are sprinkled around the magnet, what will happen?

• The filings will move away from the magnet's field.

• The filings will show a magnetic field attraction between the north and south poles.

• The filings will not create a pattern.

• The filings will show a magnetic field repulsion between the north and south poles.

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Which answer best describes this image?

• The positive charge is repelling the negative charge.
• The blue charged object will repel the negatively red charged object.
• The positively charged red object will be attracted to the negatively charged blue object.

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Which is true for both electric and magnetic field lines.

• They are visible if you look close enough.

• The closer the lines, the weaker the force.

• The closer the lines, the stronger the force.

• They always leave the south pole or negatively charged particle.

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What 2 factors effect the gravitational pull between 2 objects?

• The distance between the objects and their masses.

• Objects repel each other if their mass is too small or their distance is too great.

• All objects experience gravity based on the amount of magnetism they encompass.

• An object's gravitational pull is determined solely by the amount of mass it contains.

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Which of the following is a type of magnet which a magnetic field is produced by an electric current?

• electromagnet

• electric field lines

• magnetic and electric stations

• magnetism and gravity

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An object that has a net force of 0 (balanced) is

• at rest.

• moving at a constant speed.

• either at rest or moving at a constant speed.

This diagram 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

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Two or more unequal forces acting on an object causing the object to accelerate.

• Unbalanced Force
• Contact Force
• Balanced Force
• Non-contact Force

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What is the net force

• 10 N
• 0 N
• 25 N
• 1 N

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