MCQ 11 MarkA boy lifts a luggage from height $2 m$ to $4 m.$ The potential energy will becomeAhalf✓doubleCone$-$thirdDone$-$fourthAnswerCorrect option: B. doubleView full question & answer→
MCQ 21 MarkWhen a boy doubles his speed, his kinetic energy becomesAhalfBdouble✓four timesDno changeAnswerCorrect option: C. four timesView full question & answer→
MCQ 31 Mark$1\ \text{H.P}$. is equal toA$1 W$B$1 J$C$746 j$✓$746 W$AnswerCorrect option: D. $746 W$View full question & answer→
MCQ 41 MarkThe expression of power $P$ isA$P=m g h$B$P=P=1 / 2 \ M v^{2 v}$C$P=F \times d$✓$P = F \times d / t$AnswerCorrect option: D. $P = F \times d / t$View full question & answer→
MCQ 51 MarkTwo coolies $A$ and $B$ do some work in time $1$ minute and $2$ minute respectively. The power spent isAsame by both coolies✓is more by coolie $A$ than by $B$Cis less by coolie $A$ than by $B$Dnothing can be said.AnswerCorrect option: B. is more by coolie $A$ than by $B$View full question & answer→
MCQ 61 MarkNo work is done by a force if the bodyAmoves in direction of force✓does not moveCmoves in opposite directionDnone of the theseAnswerCorrect option: B. does not moveView full question & answer→
MCQ 71 MarkThe $\text{S.I}.$ unit of work isAsecondBmetre✓jouleDnewtonAnswerCorrect option: C. jouleView full question & answer→