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Science > Motion Unit > Flashcards

Motion Unit Flashcards

1
Q

Average velocity

A

All the velocities added up and then divided by the amount added together

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2
Q

Final velocity

A

Finishing speed or velocity

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3
Q

Deceleration

A

Negative acceleration

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4
Q

Vector quantity

A

Posing both magnitude and direction

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5
Q

Velocity

A

Speed with a direction

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6
Q

Initial velocity

A

Starting speed or velocity

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7
Q

Acceleration

A

The rate of change in velocity

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8
Q

Speed

A

The rate at which something happens

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9
Q

Scaler quantity

A

This means that it does not have a direction only a magnitude(size)

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10
Q

What is the equation to find acceleration

A

Vf-Vi/t=A

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11
Q

What does the slope of the speed vs time graph represents

A

Acceleration

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12
Q

A speed versus time graph what is on the X and Y axis?

A

Time is on the X axis

Speed is on the Y axis

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13
Q

If the slope of a speed versus time graph is positive the object is

A

Accelerating

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14
Q

If the slope of a speed versus time graph is negative the object is

A

Decelerating

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15
Q

Acceleration is a___ it has a magnitude and a direction

A

Vector quantity

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16
Q

What is the equation to find time on a SPEED VS TIME graph

A

T=V2-V1/A

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17
Q

What is the equation to find speed

A

S equals D divided by T

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18
Q

Speed is a scaler quantity this means…

A

It does not have a direction only a size

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19
Q

Velocity is a vector quantity which means…

A

It has a magnitude And a direction

20
Q

How do you find time

A

Distance divided by speed

21
Q

Do you find distance

A

Time times speed

22
Q

What does a distance time graph represents

A

Speed

23
Q

Magnitude

A

A number assigned to quantity so that it may be compared with other quantities (size)

24
Q

What is motion

A

The change in position of an object relative to a frame of reference

25
Q

What does the slope on the distance time graph indicate

A

Velocity

26
Q

What force opposes horizontal motion

A

Gravity

27
Q

What unit measures force

A

M/S^2

28
Q

If the forces acting on their balance would be?

A

Moving with a constant velocity

29
Q

If your man is on earth is 135 kg what is it on the moon?

A

The same

30
Q

How big is the net force acting on an object with a constant velocity?

A

Zero

31
Q

The fact that when you shoot a gun the bullet travels farther and faster than the gun itself shows what law?

A

2 diffrent laws can explain this

32
Q

Acceleration of an object must be caused by in force that is

A

Not 0

33
Q

The inertia is related to its:

A

Mads only

34
Q

The main reason ocean tides exist is that the pull of the moon is:

A

Greater on the oceans closer to the moon and less on oceans farther from the moon

35
Q

Why don’t we feel each other’s gravitational force?

A

Because we are too small the feet feel each other and we have to small of a mass

36
Q

What would happen to two objects you habitation forced if the distance was cut in 1/2

A

F•4

37
Q

What would happen to the gravitational force of two objects when one man this is doubled in the distance is doubled?

A

F•2

38
Q

What happens to the gravitational force of two objects when both masses are doubled in the distance is double?

A

Stays the same f•1

39
Q

What are the units for distance

A

Meters

40
Q

What are the units for time

A

Second

41
Q

What is the unit for speed

A

M/S speed is distance covered overtime

42
Q

On the speed vs time graph what are the labels for the X and Y axis and what does the slope give you

A

X-time
Y-speed
Slop is acceleration

43
Q

What is equilibrium

A

When the net force on an object is equal to zero . in equilibrium will either be at rest or moving at constant velocity

44
Q

If an object is in on minimums know for sure what can be happening to the object

A

Exhilarating decelerating or change in direction

45
Q

What happens when a force is unbalanced

A

In object will accelerate decelerate and or change direction

46
Q

What is terminal velocity

A

When the force of gravity’s acceleration is equal to the friction of air resistance

47
Q

What is orbital lost and how does it relate to distance

A

The closer the object is to the object it’s orbiting the faster it must go

Science (5 decks)

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