Question 11 MarkThe ratio between the input energy to the output energy of a machine is called its efficiency.AnswerTRUEView full question & answer→
Question 21 MarkThe output energy of a good machine is always greater than input energy.AnswerFALSEView full question & answer→
Question 31 MarkThe energy supplied to a machine in doing some mechanical work is called input energy.AnswerTRUEView full question & answer→
Question 41 MarkThe ratio between useful load lifted to the effort applied is called mechanical advantage.AnswerTRUEView full question & answer→
Question 51 MarkMachines are used for doing dangerous works only.AnswerFALSEView full question & answer→