Mechanical Engineering - Engineering Mechanics - Discussion

Since we have initially considered 'a' as the acceleration. So what we 'a' actually comes out is the acceleration.

I also think B is the correct answer.

No it not B,

Read the question carefully we have to find out relative acceleration which is;
(g-a)= g- g/3= 2g/3 and the answer is D.

I think its quite different than we are thinking.

If I consider the acceleration of the list is "a" while moving upward and also downward, The upward force is "Fu" and downward force is "Fd",.

Resultant acceleration while moving downward is (g-a) and while moving upward {g-(-a)}=(g+a).

According to the condition Fd=Fu/2,
m(g-a)=m(g+a)/2,
a=g/3.

And hear is the tricky part, we don't have to find out the value of "a", read the question, actually, we have to find out resultant acceleration which is (g-a)
and (g-a)= g-g/3
(g-a)= 2g/3.

And the correct answer is 2g/3 (option D).

Yes, it is B.

After compairing both situations.

The acceleration = g/3.

Ans D is correct.

Proof whenever lift moving downwards tension is less compare to upwards tension . Hence here given tension for downwards 1/2 men's 0.5 . Upwards men's more than 0.5 is correct but given option A. g/2 = 0.5. Option b. g/3 = 0.33 option c. g/4 = 0.25.

So answer D is correct.

I think it is option B.

Absolutely the answer is g/3.

It should be g/3.

If the tension is being half on moving downwards then surely be double on upward.