14.4 study guide newtons laws Flashcards

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1
Q

What is always required to overcome inertia?
a. force of friction
b. force of gravity
c. unbalanced force
d. two of the above

A

unbalanced forces

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2
Q

An object at rest will stay at rest as long as the net force acting on it is
a. positive.
b. strong.
c. stable.
d. zero.

A

zero

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3
Q

Inertia causes a moving object to
a. keep moving.
b. stop moving.
c. slow down.
d. speed up.

A

keep moving

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4
Q

The inertia of an object depends on its
a. mass.
b. speed.
c. velocity.
d. direction.

A

mass

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5
Q

The acceleration of an object is inversely related to its
a. mass.
b. speed.
c. weight.
d. velocity.

A

mass

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6
Q

If you apply 10 N of force to a 10-kg object, what will be the object’s acceleration?
a. 10 m/s2
b. 10 N/kg
c. 1 m/s2
d. 1 kg/N

A

1 m/s2

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7
Q

What is the SI unit for momentum?
a. kg/s2
b. kg * m/s2
c. kg * s/m
d. none of the above

A

none of the above

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8
Q

T/F: _____ Newton’s first law of motion applies only to stationary objects.

A

false

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9
Q

T/F: _____ It takes more force to start running than to keep running.

A

true

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10
Q

T/F: _____ It is harder to stop a 60-kg football player than a 40-kg football player if they have the same velocity.

A

true

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11
Q

T/F: _____ An object’s acceleration depends on its mass and speed.

A

false

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12
Q

T/F: _____ If you increase the net force acting on an object, its acceleration also increases.

A

true

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13
Q

T/F: _____ Newton’s second law of motion applies only to objects that are moving.

A

false

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14
Q

T/F: _____ If you know an object’s mass, you also know its weight because mass and weight measure the same thing.

A

false

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15
Q

T/F: _____ Newton’s third law of motion describes how forces act in pairs.

A

true

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16
Q

T/F: _____ When objects collide, momentum is usually lost.

A

false

17
Q

T/F: _____ Momentum is a type of force.

A

false

18
Q

Newton’s __________ law of motion is also known as the law of inertia.

A

____first______

19
Q

A stationary object resists movement because of __________

A

____inertia______

20
Q

Inertia is greater when objects have greater __________.

A

_____mass_____

21
Q

Newton’s __________ law of motion relates acceleration to force and mass.

A

_____second_____

22
Q

An object will accelerate only if the net force acting on the object is greater than __________.

A

_____zero_____

23
Q

The __________ of an object is equal to its mass multiplied by the acceleration due to gravity.

A

_____weight_____

24
Q

According to Newton’s __________ law of motion, every action has an equal and opposite reaction.

A

_____third_____

25
Q

Two objects with the same velocity have the same momentum only if they also have the same __________.

A

_____mass_____