Questions
A balloon starting from rest ascends vertically with uniform acceleration to a height of 100 m in 10 s. The force on the bottom of the balloon by a mass of 50 kg is (Take, g = 10 ms-2) [EAMCET 2013]
detailed solution
Correct option is C
Given, h = 100 m and t = 10 sFrom second equation of motion, h = 12at2⇒ a=2ht2=2×100(10)2=2 ms-2Now, F=m(g+a)=50(10+2)=600 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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