Extended Physics Flashcards

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1
Q

What happens at the start of a jump out of a plane

A

At the start of the jump the air resistance is small so he accelerates downwards

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2
Q

What happens when the speed increases

A

The air resistance will also increase

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3
Q

What happens eventually

A

The air resistance will be enough to balance the skydivers weight. At this point the forces become balanced so his speed becomes constant. This is called terminal velocity

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4
Q

What is air resistance

A

When the air rubs against a moving object slowing it down. It’s called air resistance or drag

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5
Q

What happens when the person opens his parachute

A

The air resistance will suddenly increase causing him to slow down

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6
Q

What happens once after he starts slowing down

A

The air resistance will start to decrease again until it balances his weight. He then reaches a new terminal velocity.

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7
Q

What are moments

A

Moment = force x distance from pivot

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8
Q

What do we measure moments in

A

Nm or Ncm

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9
Q

What two things does pressure depend on

A

How much force is applied

How big or small the area on which the force is applied is

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10
Q

What is the equation to work it pressure

A

Pressure = force(N)/ area(m2)

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11
Q

What do we measure pressure in

A

N/m^2

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