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science > Speed And Newtons Laws > Flashcards

Speed And Newtons Laws Flashcards

0
Q

To determine the acceleration of an object moving in a straight line you must…

A

Calculate the change in speed per unit of time

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1
Q

Acceleration

A

•Is the rate at which velocity changes

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2
Q

Inertia

A

The tendency of an object to resist a change in motion

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3
Q

Newtons first law of motion:

Law of inertia

A

An object in motion will stay in motion, an object at rest will stay at rest unless acted on by an outside force

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4
Q

Newtons second law of motion:

Law of acceleration

A

Acceleration depends upon the objects mass and force acting on the object

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5
Q

What is the unit label for newtons

A

N

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6
Q

What is the formula for force

A

Force equals mass times acceleration

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7
Q

What is the formula for acceleration

A

Acceleration equals force divided by mass

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8
Q

What is the formula for mass

A

Mass equals force divided by acceleration

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9
Q

Force

A

A push or pull

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10
Q

Newton

A

The SI unit that the strength of a force is measured in

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11
Q

Motion

A

If the distance from another object is changing

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12
Q

Reference point

A

A place or object used for comparison to determine if something is in motion

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13
Q

International system of units

A

System of measurement scientists all over the world use so they can communite clearly

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14
Q

Meter

A

The SI unit of length it’s a little longer than a yard

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15
Q

Speed

A

The distance the object travels per unit of time

16
Q

Average speed

A

Divide the total distance traveled by the total time

17
Q

Instantaneous speed

A

The rate at which an object is moving at a given instant in time

18
Q

Velocity

A

Speed in a given direction

19
Q

Slope

A

The steepness of a line on a graph

20
Q

What is the formula for distance

A

Distance equals speed times time

21
Q

What is the formula for speed

A

Speed equals distance divided by time

22
Q

What is the formula for time

A

Time equals distance divided by speed

23
Q

Three ways acceleration changes

A
  1. Increasing speed
  2. Decreasing speed
  3. Changing direction
24
Q

What do you have to do to determine the acceleration of an object moving in a straight line

A

You must calculate the change in speed per unit of time

25
Q

What is the formula for acceleration

A

Acceleration=
Final speed - Initial speed
——————————-
Time

26
Q

What is the SI unit for acceleration

A

Meters per second per second

M/S2

27
Q

Distance

A

The farther apart two objects are the less the gravitational force between them

28
Q

Why do all objects fall at the same rate

A

Due to gravity

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