NO clue

AIEEE 2015 Online › Mechanics questions › NO clue

All pulleys weigh 1kg each. A,B,C are movable pulleys and D,E are
fixed.All strings are light and inextensible.Which of the following
statements are correct--
A.The tension in the string in 6.5 N
B.accel. of A is g/3 downward.
C.accel. of B is g/6 upward.
D.accel. of C is g/3 upward.

#Physics #Mechanics

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5 Answers

1

Samarth Kashyap ·2009-05-27 20:28:15

2y_c+y_b+y_a=const.
therefore, 2a_c+a_a+a_b=0
T+mg-2T=ma_a
T+mg-2T=ma_b
mg-2T=ma_c

putting m=1 and solving,
a_a=a_b=-a_c=g/3

and T=6.5 N

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1

Samarth Kashyap ·2009-05-27 20:30:03

the answers are options (a) and (c)

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11

Gone.. ·2009-05-27 20:40:50

answers-- a,b,d.
Source-Arihant IIT physics.

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3

msp ·2009-05-27 20:46:11

see ur constraint relation.

y_c+y_b+2y_a=k

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1

Samarth Kashyap ·2009-05-29 03:31:07

sorry, my answers are correct, the options i've marked are wrong... its (a), (b) and (d)

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