Can you do it in 3 minutes?

Classical Mechanics Level 5

Given a toy with $2N$ bars with mass each bar m kg angle between two adjacent bars is $\theta = 90^\circ$ .

Find the force $F$ applied for equilibrium if $m=1\text{ kg},N=10,g=9.8$ .

the toy is fixed at point A.

Assume the surface is smooth.

A single bar is highlighted in the pic.

Source : NSEP-3.

The answer is 980.

1 solution

Aryan Goyat
Apr 28, 2016

for doing it within 3 min use virtual work method

what's that? Please explain your method.

Ayush Agarwal - 5 years, 1 month ago

you can find it here https://brilliant.org/discussions/thread/virtual-work-method/

aryan goyat - 5 years, 1 month ago

what time did you took doing it using your method and also post it.

aryan goyat - 5 years, 1 month ago

at least tell me the time you took.

aryan goyat - 5 years, 1 month ago

Oh i didn't know it was called virtual work method,but i knew it.Anyway I've seen a similar question earlier,and i knew the answer,so all i had to do is plug in the values,Took me less than 15 seconds. ; ) . I'll post a solution,when i solve it again.

Ayush Agarwal - 5 years, 1 month ago

@Ayush Agarwal – could you provide me the link of it

aryan goyat - 5 years, 1 month ago

@Aryan Goyat – i'm not sure,it was way back! i'll surely provide it if i come across it by any means.

Ayush Agarwal - 5 years, 1 month ago

Can you do it in 3 minutes?

Source : NSEP-3.

The answer is 980.

1 solution

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