# kinetic energy derivation OCR A LEVEL HELP!!!

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#1
Came across this question in the textbook but need help answering it:
derive an equation for kinetic energy in terms of speed v, weight of an object W,and acceleration of free fall g

any help is much appreciated
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1 year ago
#2
(Original post by USMAAN gh)
Came across this question in the textbook but need help answering it:
derive an equation for kinetic energy in terms of speed v, weight of an object W,and acceleration of free fall g

any help is much appreciated

Well, Ke= 1/2 x mass x speed^2
Weight=mass x gravity
Maybe you could do something with this, I’m not entirely sure how to do it.
Is this gcse or a level ?
1
#3
(Original post by Becky_x56)
Well, Ke= 1/2 x mass x speed^2
Weight=mass x gravity
Maybe you could do something with this, I’m not entirely sure how to do it.
Is this gcse or a level ?
its A LEVEL ocr physics
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1 year ago
#4
so you can say m = W/g

then replace m with W/g in the formula for kinetic energy.
1
#5
(Original post by the bear)
so you can say m = W/g

then replace m with W/g in the formula for kinetic energy.
what would velocity be then? i understand how mass is derived now
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1 year ago
#6
(Original post by USMAAN gh)
what would velocity be then? i understand how mass is derived now
you mentioned speed in the first post. that will be the velocity.
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#7
of course!
thanks for the help, that makes much better sense now
(Original post by the bear)
you mentioned speed in the first post. that will be the velocity.
1
1 year ago
#8
(Original post by USMAAN gh)
of course!
thanks for the help, that makes much better sense now
may m*dv/dt be with you
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