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In a certain machine, an effort force of 10 N is used to lift a load of 40 N. Calculate the mechanical advantage of the machine.

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Important Questions on Simple Machines

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Science>Physics>Simple Machines>Machines and Simple Machines
Suggest some simple methods to maintain a machine.
EASY
Science>Physics>Simple Machines>Machines and Simple Machines
Can a machine have an efficiency of 100 % ? Give a reason to support your answer.
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Science>Physics>Simple Machines>Machines and Simple Machines
The outer parts of machines are painted to protect them from_____________
EASY
Science>Physics>Simple Machines>Machines and Simple Machines
Choose the correct option to maintain a machine
EASY
Science>Physics>Simple Machines>Machines and Simple Machines
'A machine is 75% efficient'. What do you understand by this statement ?
EASY
Science>Physics>Simple Machines>Machines and Simple Machines
For an ideal machine, the efficiency is :
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Science>Physics>Simple Machines>Machines and Simple Machines
The outer parts of machines are painted to protect them from _____.
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Science>Physics>Simple Machines>Machines and Simple Machines
Why do machines require proper care and maintenance? 
EASY
Science>Physics>Simple Machines>Machines and Simple Machines
Define the term efficiency of a machine.
EASY
Science>Physics>Simple Machines>Machines and Simple Machines
In certain machine an effort force of 10N is used to lift a load of 30N. Calculate the mechanical advantage of the machine.
EASY
Science>Physics>Simple Machines>Machines and Simple Machines
The proper care and maintenance of machines require
EASY
Science>Physics>Simple Machines>Machines and Simple Machines
Select the correct statement :
EASY
Science>Physics>Simple Machines>Machines and Simple Machines
In an ideal machine, work done on load is equal to the work done by effort. 
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Science>Physics>Simple Machines>Machines and Simple Machines
Why lubricants are applied to the machine parts?
EASY
Science>Physics>Simple Machines>Machines and Simple Machines
Why do all machines require proper care and maintenance?
EASY
Science>Physics>Simple Machines>Machines and Simple Machines
The useful work done by an actual machine is always _____ than the work done on the machine. (less, more)
EASY
Science>Physics>Simple Machines>Machines and Simple Machines

Write the quadrants in which the following points lie:

-4,7

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Science>Physics>Simple Machines>Machines and Simple Machines
Machines have to be maintained. Why is this so?
MEDIUM
Science>Physics>Simple Machines>Machines and Simple Machines
Find reason: A machine cannot be 100 per cent efficient.
EASY
Science>Physics>Simple Machines>Machines and Simple Machines
What care would you take to increase the life span of a machine which you use?