Qualification > Sciences

Physics nov 08

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Shogun:
alright

a7medokool:
So shogun did u figuire it out yet?

Shogun:
bii)the equation is:
force=mass* acceleration

biii) f=ma
where f=force
          m=mass
         a=acceleration
so here a=2 and 'm' is giben as 12kg

so to find resultant force (f): 12*2=24N

ci)to find the total resultant force u have to add 24N and 14N (given in the question) we need to find 'a' (acceleration)
so 24+14=38N(total resultant force)
then use the formula (f=ma)
so it would be 38N=12*a
then by changing position (algebra) it will become 38/12
u get aceeleration 'a'= 3.17 meter per second square (m/s^2)

ci) use the formula to find velocity which is (velocity = acceleration*time) where 'a'=3.17 (from previous answer) and 't'=2.5s (given in the question)
so then 3.17*2.5
u get= 7.9m/s

d) the car moves with uniform acceleration. ((because at original angle of incline. it didnt accelerate because no resultant as friction force was same as the acceleration of the car.but here lubrication was added so friction froce was reduced and there was a resultant force (the accleration) thus the car aceelerated.))

any confusion or difficulty plz do ask me, im all here

a7medokool:
Hmmm this is the 2nd variant Questions? right
I was aking about the 1st

Shogun:
oh ok
then i ll try to find out the first variant one..

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