Questions
A dynamometer D is attached to two bodies of masses M = 6kg and m = 4 kg. Forces F = 20N and f = 10N are applied to the masses as shown. The dynamometer reads
detailed solution
Correct option is D
Acceleration of system, a=F-fM+m=20-106+4=1 ms-2 (towards left) Let F0 be the reading of dynamometer, then equation of motion of mass m would be F0 - f = ma⇒ F0=f+ma=10+(4)(1)=14 NTalk to our academic expert!
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Statement I : The familiar equation mg = R for a body on a table is true only if the body is in equilibrium.
Statement II : The equality of mg and R has no connection with the third law.
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