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Q.

Two masses m1 = 5 kg and m2 = 4.8 kg tied to a string are hanging over a light frictionless pulley. What is the acceleration of the masses when they are free to move? (g = 9.8 m/s2)

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a

9.8 m/s2

b

4.8 m/s2

c

0.2 m/s2

d

5 m/s2

answer is A.

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Detailed Solution

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Acceleration =m1−m2m1+m2g=5−4.85+4.8(9.8)=0.2m/s2

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