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Q) 5

static frection is come to play before the body is strat moving right....

during static frection if body can not move so d=0 or W=Fd , W=F(0) = 0

so static frection canot do non zero work....!

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aieee qus try

horizontal
ux= U Cos ?
motion along horizontal
x= Ux t +1/2 axt2
ax=0
x= U Cos ? t or t= x /U Cos ?

motion along vertical
y= Uy t + ½ ay t2

y= U sin ? t + ½ (-g) t2
= U sin ? t ? ½ g t2
Putting t = x/U Cos ?
y= U sin ? x/ U Cos ? - ½ g x2/U2 cos2 ?
tan ? - (g/2U2Cos2 ?) x2 called trajectory

its great

i thing its c)

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How the mas of body affected on charging?

why the bridges r diclear unsafe after long use ?