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physics > Module 2 Part 2: Forces Acceleration and Energy > Flashcards

Module 2 Part 2: Forces Acceleration and Energy Flashcards

1
Q

what is the law of conservation of energy

A

Energy is never created or destroyed it only changes between one form and another

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2
Q

what types of energy are there (3)

A

kinetic energy
potential energy
Electromagnetic energy

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3
Q

list types of kinetic energy (3)

A

thermal
sound
linear kinetic

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4
Q

list types of potential energy (3)

A

chemical
gravitational
elastic

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5
Q

list types of Electromagnetic energy (3)

A

light
Gamma
x-ray

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6
Q

what is kinetic energy

A

moving energy

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7
Q

what is potential energy

A

stored energy

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8
Q

what is the symbol for kinetic energy

A

K

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9
Q

what is the equation for Kinetic energy

A

K = 1/2 mv²

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10
Q

what is the unit for kinetic energy

A

Joule(J)

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11
Q

what is the equation for velocity using kinetic energy

A

v = √(2K/m)

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12
Q

how is kinetic energy in an object changed (2)

A

to speed up is to increase in kinetic energy

to slow down is to decrease in kinetic energy

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13
Q

what is work

A

a change in energy

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14
Q

what is the symbol for work

A

W

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15
Q

what is the equation for work (3)

A

W = ΔE
W = Fₙₑₜs
W =mg

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16
Q

what is work measured in

A

Joules(J)

17
Q

what is gravitational potential energy

A

energy an object possesses because of its position in a gravitational field

18
Q

what is the symbol for gravitational potential energy

A

U

19
Q

what is the equation for change in gravitational potential energy

A

ΔU = mgΔh

20
Q

what is said about the relationship between work and gravitational potential energy (2)

A

Objects raised against a gravitational force need work to be applied to do so (W = mg)

When objects fall in the direction of the field, work is done by the field

21
Q

what is the relationship between gravitational potential energy and kinetic energy when an object is lifted

A

ΔUₜₒₚ = ΔKᵦₒₜₜₒₘ

22
Q

what is power

A

the rate at which work is done

23
Q

what is the symbol of power

A

P

24
Q

what is the equation for power (2)

A 
P = W/t
P = ΔE/t
25
Q

what is unit for power

A

Watt (W)

physics (10 decks)

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