InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
You have a bag of cotton and an iron bar, each indicating a mass of 100 kg when measured of a weighing machine. In reality, one is heavier than the other. Can you say which one is heavier and why? |
| Answer» We know that true weight`=`apparent weight`+`upthrust. The cotton bag is heavier that the iro bar. This is due to the reason, than the bag of cotton which has more volume (as it has less density ) than the iron bar (which has more density), experiences more upthrust due to air. | |
| 102. |
Define thrust, what is its unit? |
| Answer» Force acting normally on a surface is called thrust. | |
| 103. |
A nail is driven into a wooden board by using a hammer. The impact of the hammer on the head of the nail produce a thrust of 25 N. If the area of the head is 0.5`mm^2` and of the tip 0.1`mm^2`. Find the pressure on the head and the top of the tail. |
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Answer» `A_1=0.5mm^2=0.5xx10^-6m^2` `A_2=0.1mm^2=0.1xx10^-6m^2` `P_1=(F)/(A_1)=(25N)/(0.1xx10^-6m^2)=250xx10^6(N)/(m^2)=25xx10^7Pa` |
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