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(i)in a simple attwood machine 2 unequal masses m1 and m2 are connected by a string going over a clamped light smooth pulley.in typical arrangement m1=300g

and m2=600g *thye distance travelled by the first block in first 2 seconds is (the attachemtn is valid for first uestion only) *the tension in the string is *draw fbds os m1 ,m2 and pulley (ii)look at second attachement of integer questions (iii)2 masses m and M respectively are connected by a light string passing over a smooth pulley when set free m moves up by 1.4 m in 2 secthe ratio of m/M is

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Equations of motion or dynamics for the diagram/question are:

If u = 0 , and t = 2 sec. s = u t + 1/2 a t^2 = 20/3 meters ============ solving the first two equations T = 2 m1 * m2 * g / (m1 + m2) = 2 * 600 * 300 * 10 / 900 = 4 000 newtons ================= iii) s = 1.4 meters t = 2 sec. u = 0. s = ut + 1/2 a t^2 => a = 2 * 1.4 / 4 = 0.7 meters/sec/sec

a = (m2 - m1) g / ( m1 + m2) = (m2/m1 - 1) g / (m2 / m1 + 1 )

========================== Block B is on top of block A.

Block A has mass m. So its acceleration = 10 Newtons / m It moves by 20 cm before block B falls. u = 0

s = u t + 1/2 a t^2

20 cm = 0 + 1/2 * (10/m) * t^2 find t from this by substituting the value of m. ========================= In the question Is the rod AB is resting on a surface OB ??

it is not clear what OB is.. is there friction at the points A and B ??