Unit Three Flashcards

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1
Q

What is the formula for speed

A

S=d/t

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2
Q

On a distance time graph what is the X and y axis and what would the slope tell you

A

Distance = y
Time= X
Slope tells you speed

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3
Q

What is the formula for distance

A

D = s X t

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4
Q

What is terminal velocity

A

When objects stop accelerating and fall at a constant speed

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5
Q

How is terminal velocity related to surface area and mass

A

No relation to mass

Larger surface area. Slower terminal velocity

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6
Q

What is the formula for acceleration

A
A= f/m 
A= s/t
A= 
vf - vi
------
T
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7
Q

On a speed time graph what does the slope give you

A

Acceleration

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8
Q

What is inertia

A

Tendency of objects to keep doing what they are doing, resist change

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9
Q

What is meant by the term equilibrium and what can an object in equilibrium be doing

A

All forces are equal and constant speed or not moving

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10
Q

If an object has a net force other than zero what is happening

A

Accelerating or decelerating

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11
Q

Is a car moving around a circular track going at a constant speed

A

Yes

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12
Q

What is the relationship between force and acceleration

A

When force increases

Acceleration increases

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13
Q

What is Newton’s second law

A

F = m X a

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14
Q

What are the units for m, f, and a

A
M = kg
F= n 
A= m/s/s
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15
Q

What is Newton’s third law

A

For every action there is an equal and opposite reaction

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16
Q

Explain how an interaction works when you push on a wall with a force of 5N

A

It pushes back with 5N

17
Q

If the force of a bat against the ball is the action what is the reaction

A

Ball pushing on the bat

18
Q

What experiences the greater force a bug or a windshield

A

Neither because the same force is exerted due to Newton’s third law

19
Q

Why does the cannon not travel as far as the cannonball

A

Because the cannon has a lager mass

20
Q

What is G gravity

A

Universal gravitation: gravitational attraction of all objects in the universe
6.67 X 10 -11

21
Q

What happened to the force of attraction between two objects if the distance between them is cut in half

A

Force increased

22
Q

What happens to the force of attraction between two objects if the mass of one object is doubled

A

Force decreased

23
Q

What has more effect on the tides of the earth, the moon or sun

A

The moon

24
Q

How do you calculate weight

A

10 m/s/s X kg

25
Q

What force opposes motion

A

Friction

26
Q

What is the distance formula

A

D = 1/2 a t (2)

27
Q

What does frame of reference refer to

A

Something assumed to be stationary, used to judge motion