Physics
A mechanic can open a nut by applying a force of 150 N while using a lever handle of length 40 cm. How long a handle is required if he wants to open it by applying a force of only 50 N ?
Related Questions
Figure shows two forces each of magnitude 10N acting at the points A and B at a separation of 50 cm, in opposite directions. Calculate the resultant moment of the two forces about the point (i) A, (ii) B and (iii) O, situated exactly at the middle of the two forces.
When a boy weighing 20 kgf sits at one end of a 4m long see-saw, it gets depressed at its end. How can it be brought to the horizontal position by a man weighing 40 kgf.
State two differences between the centripetal and centrifugal force.
What is the position of centre of gravity of a:
(a) rectangular lamina
(b) cylinder?