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PHYSICS [1 Mark Question Answer]

Simple Machine · ICSE STD 6 (ICSE - English Medium). 14 questions.

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[1 Mark Question Answer]

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14 questions · timed · auto-graded

Question 11 Mark
The front end of a boat is shaped like a wedge.
Answer
The front end of a boat is shaped like a wedge so that it can easily cut across the flowing water.
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Question 21 Mark
The efficiency of a machine is always less than 100%.
Answer
Efficiency of a machine is always less than 100% as output energy is always less than the input energy, because some energy is lost to overcome friction.
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Question 71 Mark
What do you understand by a complex machine ?
Answer
Machines such as sewing machines or cars that have more than one moving part are called complex machines.
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Question 81 Mark
What is the basis of classification of levers ?
Answer
Levers are classified on the basis of the relative positions of load, effort and fulcrum.
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Question 91 Mark
Write the formula for calculating the efficiency of a machine.
Answer
Efficiency $=\frac{\text { Output energy }}{\text { Input energy }}$
The percentage value of efficiency of a machine is calculated as :
Efficiency $=\frac{\text { Output energy }}{\text { Input energy }} \times 100 \%$
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Question 121 Mark
Write the relationship between mechanical advantage, load and effort.
Answer
Mechanical advantage (MA)=$\frac{\text { Lord }}{\text { Effort }}$
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[1 Mark Question Answer] - PHYSICS STD 6 Questions - Vidyadip