Ch. 1 Review

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Class Period

• 1st
• 2nd
• 3rd
• 4th
• 5th

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

What is the net force on this box?

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

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 400 N and the team on the right pulls with a force of 300 N. What is the net force on the rope?

• 100 N to the right
• 100 N to the left
• 700 N to the right
• 430 N to the left

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

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

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

An object's weight is ____ to its mass.

• equal to
• less than
• proportional to
• greater than

The unit of force is ____.

• m/s
• the hertz
• the joule
• the newton