Motion Flashcards

1
Q

An object in motion will stay in motion in a straight line, forever, unless acted upon by an unbalanced force.

A

Half of Newton’s First Law

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2
Q

An object at rest will remain at rest unless acted upon by an unbalanced force

A

The other half of Newton’s First Law

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3
Q

If an object is experiencing an unbalanced force, we know that the _________ _____________ is not zero.

A

Net Force

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4
Q

If objects in motion tend to stay in motion, forever, unless acted upon by a net force, why do we seem to always see objects slowing down on their own?

A

Friction

(This is the force usually slowing down objects, and it is hard to actually see where the friction is coming from)

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5
Q

Another name for Newton’s First Law

A

Law of Inertia

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6
Q

Inertia means almost the same thing as __________

A

Mass

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7
Q

Objects with bigger mass have more _________

A

Inertia

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8
Q

If all the forces on an object are balanced, then there is no net force. In this case, we say the object is in ____________

A

Equilibrium

(Note: An object in equilibrium will have no acceleration, this means it could be either standing still OR moving along at a constant velocity)

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9
Q

Gravity can apply a ___________

A

Force

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10
Q

Magnetism can apply a __________

A

Force

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11
Q

Electrical charges can apply a _________

A

Force

(Think of static electricity pulling a sock onto your shirt when you take them out of dryer.)

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12
Q

“m” is a unit of

A

distance

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13
Q

“in” is a unit of

A

distance

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14
Q

“cm” is a unit of

A

distance

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15
Q

“miles” is a unit of

A

distance

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16
Q

”s” is a unit of

A

time

”s” means “seconds”

17
Q

“hr” is a unit of

A

time

18
Q

“days” is a unit of

A

time

19
Q

“m/s” is a unit of

A

speed

(Units of speed will always have a distance over a time)

20
Q

“cm/day” is a unit of

A

speed

(Units of speed will always have a distance over a time)

21
Q

“mm/yr” is a unit of

A

Speed

(Units of speed will always have a distance over a time)

22
Q

“m/s North” is a unit of

A

Velocity

(notice that it has a direction included)

23
Q

“mm/yr East” is a unit of

A

Velocity

(notice that it has a direction included)

24
Q

“cm/hr West” is a unit of

A

Velocity

(notice that it has a direction included)

25
Q

“miles North” is a unit of

A

Displacement

(Displacement is a vector, so it has both magintude and direction.)

26
Q

“cm West” is a unit of

A

Displacement

(Displacement is a vector, so it has both magintude and direction.)

27
Q

Displacement

Vector or Scaler?

A

Vector

28
Q

Velocity

Vector or Scaler?

A

Vector

29
Q

Speed

Vector or Scaler?

A

Scaler

(has only magnitude)

30
Q

Distance

Vector or Scaler?

A

Scaler

(Distance has magnitude only)

31
Q

m / s2 is a unit of

A

acceleration

(notice the the units on the bottom is seconds squared)

32
Q

“inches / day2 is a unit of

A

acceleration

(notice the the units on the bottom is days squared)

33
Q

A displacement/time graph is very similar to a ..

A

Distance/time graph

34
Q

Displacement

A

How far you are from where you started.

(Very similar to “distance”)

35
Q

the “sum of forces” on an object means

A

the net force on the object