awaisamin20
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Please somebody help me solving these questions
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welcome to pf!
hi awaisamin20! welcome to pf!
show us what you've tried, and where you're stuck, and then we'll know how to help!
hi awaisamin20! welcome to pf!
show us what you've tried, and where you're stuck, and then we'll know how to help!
awaisamin20
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well in question 13(1st picture)...from which point i should calculate the moment??...i tried it with the point B...is it correct??...
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no!
they mean the moments about the pivot point, O
(that way you don't need to find the reaction force at O, which would be very difficult!
)
they mean the moments about the pivot point, O
(that way you don't need to find the reaction force at O, which would be very difficult!
)try again!
awaisamin20
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in Question 14...2nd picture...as the tension in the string is equal to the weight...so if we consider every case seprately..each mass causes 'mg' tension in string..so will n no. of masses 'm' cause 'nmg' tension??..
awaisamin20
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tiny-tim said:no!
they mean the moments about the pivot point, O
(that way you don't need to find the reaction force at O, which would be very difficult!
try again!
which is the pivot point O here??
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no, stop waffling …
do a proper free body diagram and Ftotal = 0 equation, for each mass (separately)
do a proper free body diagram and Ftotal = 0 equation, for each mass (separately)
pongo38
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For the second diagram with the L shaped member with 10 and Mc on it ... in all fairness, there is a trick to this which involves adding a force at A and then taking it away at the same time, so that the result is unchanged. then you look at the enhanced diagram in a new way.