Questions
Waterjet is coming out of a hose pipe of diameter 20 cm with speed 20 cm/sec. It strikes a man in elastically. Find the force exerted by water jet on the person
detailed solution
Correct option is B
F=vdmdt=v(ρAv)=ρAv2=(1000)3.14×10−12(0.2)−2=1.26NTalk 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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