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A dynamometer D is attached to two bodie...

A dynamometer D is attached to two bodies of masses M=6 kg and m=4 kg. Force F=20 N and f=10N are applied to the masses as shown. The dynometer reads

A

10N

B

20N

C

6 N

D

14 N

Text Solution

Verified by Experts

The correct Answer is:
D
(d) Acceleration of system,
`a=(F-f)/(M+m)=(20-10)/(6+4)=1 ms^(-2)" " ` (towards left)
Let `F_(0)` be the reading of dynamometer, then equation of motion of mass m would be,
`implies F_(0)=f+ma=10+(4)(1)=14N`
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