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phy p2 doubts =\

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astarmathsandphysics:
thanks for doing the uncertainty question. Cat being overaffectionate at the mo

Twinkle Charms:
thanks to both =)

Twinkle Charms:

--- Quote from: astarmathsandphysics on June 07, 2010, 11:37:23 pm ---Q2 d (ii) in O/N07,  why do we add the forces 75 and 23 and why not subtract
I dont understand your question
use P=Fv=23*4.5=103.5W

--- End quote ---
thats rong, ull be awarded only 1 mark out of 2.

in mark scheme they added both the forces and then used in this eqtn p=fv, why?
F=75N is taken from the previous sub question's answer.

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