1.

A particle of mass 200g is thrown vertically upwards with a speed of 10ms^-1, the work done by force of gravity while the particle goes up is given by _____(a) 0.5J(b) 5J(c) 10J(d) 15JThis question was addressed to me in an interview for job.I'd like to ask this question from Kinetic Energy topic in portion Work, Energy and Power of Physics – Class 11

Answer»

Correct OPTION is (c) 10J

Easy explanation: The maximum height ATTAINED by particle is given by u^2/(2*G). So total work done would be gain in POTENTIAL energy i.e. m*g*h = m*g*(u^2/(2*g))= (200/1000)*10*(10^2/20) = 10.



Discussion

No Comment Found

Related InterviewSolutions