Question

AB and AC are two uniform rods of length 12m and 8 m respectively. if angle BAC =60° .find the distance from A of the C.G. of the two rods​

Answer 1

Answer:

Solution

Correct option is

A

19/14 m on the side of heavier rod

C

1

and C

2

be the center of two rod.

Now X be the distance of com from side of heavier rod.

X=

m

1

+m

2

m

1

x

1

+m

2

x

2

=

ϱ

1

×5+ϱ

2

×3

(ϱ

1

)×5+2.5×ϱ

2

×3×6.5

=

21

15×2.5+6×6.6

=

21

76.5

=

7

25.5

=

14

51

fromA

Center of mass will be 5−x from left of point B.

=

14

19

left from B heavier end of joining.