Newton's Laws of Motion: Self-Test

Take this self-test to review important knowledge of Newton's Laws of Motion
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Questions #: 11
Time: 10 minutes
Pass Score: 80.0%
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Newton's first law

An object at rest tends to stay at and an object in motion tends to stay in in a line at a constant

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State Newton's second law in equation form

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Is acceleration a scalar or a vector quantity?

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What is the acceleration of the object?

Three newtons are exerted northward on a 10-kg object while 4 newtons are exerted southward.  What is the acceleration of the object?

  1. Acceleration = m/s2
  2. Direction =
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What is the unit of force in the SI system?

Missing
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How much does a 3-kg object weigh?

weigh = N

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Explain why a heavier object does not fall faster

Explain why a heavier object does not fall faster when dropped since the accelerating force (its weight) is greater.

Explanation:

its mass is greater by just the _______ as its weight.  Thus, an application of Newton's second law (F = ma) results in the same acceleration

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Does an object continue to accelerate if dropped from a tall building?

The acceleration of gravity is 9.8 m/s2 downward.  In actual practice, does an object continue to accelerate if dropped from a tall building?

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Whirling a shoe tied to a rope above your head

You have tied a shoe to a rope and are whirling it above your head. The following are the forces on the shoe.  State the direction of each force

  1. Gravity (1) transparent
  2. String (2) transparent
  3. Air friction (3) transparent
drag and drop the selected option to the right place
pulls inward toward the center
pulls downward on the shoe
acts in the direction opposite to the motion of the shoe
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State Newton's third law

For every force object X exerts on Y, Y exerts an equal and force on

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Corresponding reaction force

My weight is the result of the earth's gravitational force on my body.  The corresponding reaction force is my body's gravitational force on the earth.

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sin cos tan
sin-1 cos-1 tan-1 π e
xy x3 x2 ex 10x
y√x 3√x √x ln log
( ) 1/x % n!
7 8 9 + MS
4 5 6 – M+
1 2 3 × M-
0 . EXP ÷ MR
± RND C = MC

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