Ch2 - Motion Flashcards Preview

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Flashcards in Ch2 - Motion Deck (35)
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1

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

Half of Newton's First Law

2

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

The other half of Newton's First Law

3

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

Net Force

4

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?

Friction

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

5

Another name for Newton's First Law

Law of Inertia

6

Inertia means almost the same thing as __________

Mass

7

Objects with bigger mass have more _________

Inertia

8

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

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)

9

Gravity can apply a ___________

Force

10

Magnetism can apply a __________

Force

11

Electrical charges can apply a _________

Force

 

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

12

"m" is a unit of 

distance

13

"in" is a unit of 

distance

14

"cm" is a unit of

distance

15

"miles" is a unit of

distance

16

"s" is a unit of

time 

 

"s" means "seconds"

17

"hr" is a unit of 

time

18

"days" is a unit of

time

19

"m/s" is a unit of

speed 

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

 

20

"cm/day" is a unit of

speed

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

21

"mm/yr" is a unit of

Speed

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

22

"m/s North" is a unit of

Velocity

(notice that it has a direction included)

23

"mm/yr East" is a unit of

Velocity

(notice that it has a direction included)

24

"cm/hr West" is a unit of

Velocity

(notice that it has a direction included)

25

"miles North" is a unit of

Displacement

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

26

"cm West" is a unit of

Displacement

 

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

27

Displacement

 

Vector or Scaler?

 

 

Vector

28

Velocity

 

Vector or Scaler?

 

Vector

29

Speed

 

Vector or Scaler?

 

Scaler

(has only magnitude)

30

Distance

 

Vector or Scaler?

 

Scaler

(Distance has magnitude only)