Mechanical Engineering - Engineering Mechanics - Discussion
Discussion Forum : Engineering Mechanics - Section 2 (Q.No. 13)
13.
A weight of 1000 N can be lifted by an effort of 80 N. If the velocity ratio is 20, the machine is
Discussion:
32 comments Page 2 of 4.
Entekarunakar said:
7 years ago
Thanks to all for proving the correct explanation.
(1)
Jeyavelmurugan said:
7 years ago
Weight is greater than effort that is reversible.
AKSHAY KALE said:
8 years ago
Less than 50% is irreversible.
Greater than 50% is reversible.
Greater than 50% is reversible.
(1)
Chandra prakash said:
8 years ago
Thanks for explaining the concept.
Omprakash Yadav said:
8 years ago
Mechanical Efficiency MA=load Lifted/Effort.
1000/80 =12.5,
Velocity ratio =20,
MA=VR 12.5 /20 *100 =62.5 %.
So it's Reversible, because >50 % is Reversible, <50% Irreversible i.e Self-locking, used in screw jack.
100% ideal machine.
1000/80 =12.5,
Velocity ratio =20,
MA=VR 12.5 /20 *100 =62.5 %.
So it's Reversible, because >50 % is Reversible, <50% Irreversible i.e Self-locking, used in screw jack.
100% ideal machine.
(2)
Bhavik mandaviya said:
8 years ago
Efficiency = 50%.
Pradeep said:
8 years ago
Less than 50% is Irreversible.
More than 50% is reversible.
Equal to 100% is ideal.
More than 50% is reversible.
Equal to 100% is ideal.
Gurav mohini said:
8 years ago
Nice. Thank you all.
Dinesh said:
9 years ago
Less than 50% is irreversible.
Greater than 50% is reversible.
Greater than 50% is reversible.
Rohit Nashik said:
9 years ago
Machine gives 100% efficiency is called machine is ideal.
Total input = total output.
It's only imaginary machine.
Total input = total output.
It's only imaginary machine.
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