Ch. 1 Review

What happens when unbalanced forces act on an object at rest?

• the object remains at rest
• the object begins moving in an unpredictable direction
• the object begins moving in the direction of the net force
• the object begins moving opposite to the direction of the net force

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What is the net force on this box?

• 20 N to the right
• 90 N to the left
• 290 N to the left
• 25 N to the right

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Why is Newton's first law sometimes called the law of inertia?

• because inertia is the tendency of objects to resist changes to their motion
• because inertia describes the application of force to an object at rest
• because inertia describes the application of force to an object in motion
• because inertia is the same thing as friction

In a tug of war, the team on the left pulls with a force of 100 N and the team on the right pulls with a force of 300 N. What is the net force on the rope?

• 200 N to the right
• 100 N to the left
• 400 N to the right
• 200 N to the left

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NGSS.MS-PS2-2

Which type of forces will cause a change in an object's motion?

• inertia
• zero net force
• balanced forces
• unbalanced forces

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10. For an object moving in a circle, what is the direction of centripetal force?

• in the direction of motion of the object
• opposite the direction of motion of the object
• towards the center of the circle
• away from the center of the circle

Using pg. 2 "Ch. 1.1 Gravity and Friction Summarizing Notes", "twice the mass = twice the ......"

• friction
• weight
• force

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Using pg. 14, "Gravity and Friction" what is the answer to #4, What happens to the gravitational attraction between two objects as the distance between them increases?

• as the distance increases the gravitational attraction increases
• as the distance increases the gravitational attraction decreases
• as the distance decreases the gravitational attraction decreases

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Using pg. 16 "Ch. 1.2 Newton's 1st Law of Motion", summarize Newton's First law of Motion.

• acceleration is equal to the force divided by the mass.
• an object at rest will stay at rest, an object in motion will stay in motion, unless acted of by an unbalanced force.
• for every action their is an equal and opposite reaction.

Using pg. 17 & 18 "Ch. 1.3 Newton's 2nd Law of Motion", Summarize Newton's second law of Motion.

• acceleration is equal to the force divided by the mass.
• an object at rest will stay at rest, an object in motion will stay in motion, unless acted of by an unbalanced force.
• for every action there is an equal and opposite reaction.

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