Topic 4 Flashcards by Catherine Boyd | Brainscape

Q

thinking distance =

A

reaction time and how fast you are going

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Q

breaking distance

A

how fast, the mass, brakes, grip

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Q

the amount you slide depends on

A

friction

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Q

momentum is always

A

conserved

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Q

momentum =

A

mass x velocity

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Q

momentum is in

A

kgm’s

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Q

force=

A

change in momentum/ time

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Q

cars protective features include

A

crumple zones, seat belts, air bags

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Q

works in the same way

A

bubble wrap

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Q

work done=

A

force X distance moved in the direction of the force

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Q

power=

A

work done / time taken

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Q

power is in watts or

A

joules/ sec

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Q

kinetic energy=

A

0.5 x mass x velocity squared

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Q

stopping distances increase alarmingly with

A

extra speed

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Q

GPE=

A

mgh

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Q

energy can never be created nor destroyed,

A

only transferred from one form to the other

Q

kinetic energy gained=

A

gpe lost

Q

most energy transfers involve some losses often such as

A

heat