Fundamentals of Mechanical Engineering ❤️
Can we apply Energy conversation when the cylinder rolls from one postion to another.
As we know for pure rolling of a material, it cannot roll when friction is absent.
As we know for pure rolling of a material, it cannot roll when friction is absent.
The answer to this poll is
1 Yes- A body cannot roll without absence of friction but the point of comtact where friction acts is static i.e in rest so static friction acts at the point of conatct.
So no energy is lost because the point is stationary, hence we can apply Energy conservation.
1 Yes- A body cannot roll without absence of friction but the point of comtact where friction acts is static i.e in rest so static friction acts at the point of conatct.
So no energy is lost because the point is stationary, hence we can apply Energy conservation.
If you hit someone by a punch👊, in which case the person will get more hurted.
Anonymous Poll
18%
1 When you simply translate your hand and hit
82%
2 When you translate and rotate both at the same time and hit
Fundamentals of Mechanical Engineering ❤️
If you hit someone by a punch👊, in which case the person will get more hurted.
The answer to this poll is
2
Because, as we know energy is constant, so more the energy input hence more will be the output.
While translating you will Induce 1/2mv^2 and by rotating you will induce 1/2*I*(omega)^2.
So the energy absorbed by another person will be more.
Bruce Lee used to punch by this method.
2
Because, as we know energy is constant, so more the energy input hence more will be the output.
While translating you will Induce 1/2mv^2 and by rotating you will induce 1/2*I*(omega)^2.
So the energy absorbed by another person will be more.
Bruce Lee used to punch by this method.
Which one of the following materials will be stronger?
Anonymous Poll
72%
1 Fine Grains
28%
2 Coarse Grains
Fundamentals of Mechanical Engineering ❤️
Which one of the following materials will be stronger?
The answer to this poll is
1 Fine grains
The dislocations will find difficulty to move because as the grain size is smaller the number of grain boundaries will be higher which acts as obstacles for dislocations, so this material will be stronger than the coarse grains materials.
1 Fine grains
The dislocations will find difficulty to move because as the grain size is smaller the number of grain boundaries will be higher which acts as obstacles for dislocations, so this material will be stronger than the coarse grains materials.
Fundamentals of Mechanical Engineering ❤️
Profit Volume ratio is independent of fixed cost
The answer to this poll is
1 True- P/V ratio indicates about how fast there is recovery of money when one unit of product is sold.
It is the ratio of (S-V) /S
It is independent of Fixed cost.
1 True- P/V ratio indicates about how fast there is recovery of money when one unit of product is sold.
It is the ratio of (S-V) /S
It is independent of Fixed cost.
Shear Stress during Torsion of shaft doesn't depend on material of shaft.
Anonymous Poll
61%
True
39%
False
Fundamentals of Mechanical Engineering ❤️
Shear Stress during Torsion of shaft doesn't depend on material of shaft.
The answer to this poll is
True- Stress is always a point phenomenon. It doesn't depend on material.
True- Stress is always a point phenomenon. It doesn't depend on material.
In PERT slack on various events is calculated whereas in CPM floats are calculated
Anonymous Poll
86%
True
14%
False
Fundamentals of Mechanical Engineering ❤️
In PERT slack on various events is calculated whereas in CPM floats are calculated
The answer to this poll is
True - Perts are event oriented and CPMs are activity oriented.
True - Perts are event oriented and CPMs are activity oriented.
When Replacement Ratios in Simplex have equal values, then the result will be
Anonymous Poll
16%
1 Infeasible Solution
13%
2 Cyclicity
15%
3 No Solution
11%
4 Unbounded Solution
45%
5 Degeneracy
Fundamentals of Mechanical Engineering ❤️
When Replacement Ratios in Simplex have equal values, then the result will be
The answer to this poll is
5 Degeneracy
5 Degeneracy
In Probability, sample space can be written
Anonymous Poll
18%
1 At a same instant
34%
2 At two different instants such that the events are mutually exclusives.
48%
3 In both the cases
Fundamentals of Mechanical Engineering ❤️
In Probability, sample space can be written
The answer to this poll is
3 - Sample space can be written at an instant and can be time dependent but the events should be mutually exclusive.
3 - Sample space can be written at an instant and can be time dependent but the events should be mutually exclusive.
Which blade will give maximum efficiency in centrifugal compressor?
Anonymous Poll
23%
1 Forward blade
55%
2 Backward blade
22%
3 Radial blade
Fundamentals of Mechanical Engineering ❤️
Which blade will give maximum efficiency in centrifugal compressor?
The answer to this poll is
2 Backward blade-
Because it has self controlling for different variation of power and it handles fluctuations easily than forward curved blades.
2 Backward blade-
Because it has self controlling for different variation of power and it handles fluctuations easily than forward curved blades.
The rate of increase of Efficiency in Brayton cycle on increasing pressure ratio
Anonymous Poll
65%
1 Increases
35%
2 Decreases
Fundamentals of Mechanical Engineering ❤️
The rate of increase of Efficiency in Brayton cycle on increasing pressure ratio
The answer to this poll is
2 Decreases- Because slope decreases as we increase pressure ratio.
2 Decreases- Because slope decreases as we increase pressure ratio.