Sorry I can't get latex working so bear with me as I am new to it. I start A-level physics in a week and during my own research I have come across something that confuses me.(adsbygoogle = window.adsbygoogle || []).push({});

Acceleration= Final velocity - Initial velocity divided by time.

What is confusing me is when your deriving other equations from this you get

at=v - u

Multiply both sides by t gives at=v-u. This confuses me cause I would get something like this

at=vt - ut

So I substituted some values in to see if at=v - u works.

Acceleration= 10 m/sec^2

Time= 2 seconds

Final velocity= 20 m/s

Initial velocity= 10 m/s

10*2= 20

20-10=10

???????? 20 does not equal 10 so how does at=v - u work?

Doing it my way I got at= vt - ut

20*2= 40

10*2= 20

40-20= 20

at=vt - ut

Then I thought about cancelling the time term for some reason and I got

10

20-10= 10

a= v - u

Probably being really stupid here and need to go over my rudimentary algebra. Ignore this I got it acceleration is actually 5 I didnt use the equation at the start right

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# Basic problem and confusion

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