free fall and terminal velocity. Flashcards

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1
Q

what is the difference between mass and weight and what is the formula?

A

mass is the amount of matter in an object.
weight is the force due to gravity on a mass.
w= mg.

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2
Q

how are weight and acceleration connected?

A

acceleration is due to gravity (=weight/ mass) is equal to the gravitational field strength.
units: m/s².

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3
Q

on earth what is the acceleration in free fall?

A

9.8m/s².

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4
Q

what is weight supported by and what happens if that was removed and what is the formula?

A

supported by reaction from the floor.
remove floor, weight is unbalanced.
acceleration= weight/ mass.

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5
Q

example: if you had hanging balls with a person about to walk through them what does the speed they’re going at relate to the force?

A

they’re going slow.
force from each particle represented by the hanging balls is small.

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6
Q

example: if you had hanging balls with a person about to run through them what does the speed they’re going at relate to the force?

A

they’re going fast.
force from each particle represented by the hanging balls is large.

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7
Q

air resistance and particles: what is drag and when does it happen?

A

frictional force that occurs when a surface moves through a fluid.

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8
Q

air resistance and particles: frictional force that occurs when a surface moves through a fluid. if this fluid is air what do we call it?

A

air resistance.

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9
Q

what will happen as an object goes faster?

A

it will hit more particles every second, more energy is transferred to the particles and more air resistance.

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10
Q

as an object has a small cross section or is streamlined what will happen?

A

hit less air particles every second so there will be less air resistance.

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11
Q
A
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