Question

can anyone give me the solution please​

Answer 1

googal per question talk karo ji

Answer 2

Answer:

i) Moment of force depresses the rule =  500  gf cm

ii) Least upward force to make metre rule horizontal =  5 gf

Step-by-step explanation:

Here, for the uniform metre rule , initially the weight is acting in downwards direction in the centre . So, this weight is causing a clockwise moment on the uniform metre rule .

i) Hence, the clockwise moment = weight of metre rule * distance from centre

                                                  = 10 gf * 50 cm  =  500  gf cm

Thus, moment of force depresses the rule =  500  gf cm

ii)  For, the metre rule to be made horizontal , net moment on it acting should be equal to zero . Least force is applied when force is applied upwards at the end of metre rule .

=> clockwise moment = anticlockwise moment

=>  500  gf cm  =  upward force * horizontal distance

=>  500  gf cm  =  upward force * 100 cm

=>  upward force  =  500  gf cm/100 cm

                             =  5 gf

Thus, least upward force to make metre rule horizontal =  5 gf