Question

Can anyway help check my explanation to the question?
for (a) , |R3| = |R2|
R2 sinθ = 30
=> R2 > 30
So (a) is correct
For (b)
R5 = 120 + R3cosθ
= 120 + 30cosθ > 150
So (b) is incorrect
For (c) since R2 and R3 are action and reaction pair, R2sinθ = R3 sinθ
Consider the whole system, R1 + R3 = R2+R4
So R1 = R4
for (d), Hmm.. don't know how to explain... But i know they form an action and reaction pair...

Answer 1

wat is ur answer?

Answer 2

if you're asking 'is', then it is B, but for 'was', it was 'A'

Answer 3

u changed ur mind to b but why?

Answer 4

i made up some explanations for me to understand :(

Answer 5

the incorrect option is a)
as the weight of body is rested at two places rather than one so the weight gets distributed so in no way can the r3 be greater than 30
also note that r3=r2

Answer 6

but then the answer is B .. very confusing..

Answer 7

if that were true also then how can r3 be greater than 30 that is near impossible

Answer 8

R2 sinθ = 30
=> R2 > 30

Answer 9

that's the only possible explanation from me..

Answer 10

R2 is resolved into 2 components..

Answer 11

ok sin@ of some angle reduces its measur
remember maximum value of sine is 1

Answer 12

that would be for 90 degrees only... obviously it is not that case, 0<sinθ<1

Answer 13

So when a number is divided by a decimal, it becomes larger..

Answer 14

i am not able to explain in mathematical terms but think abt it when a body rests at more than one location the weight is shared equally right

Answer 15

since it is in eqm,
R2 cosθ = W
R2 cos θ = 30
R2 = 30/cosθ for 0<θ <1