1) Two forces each of magnitude 10N act vertically upwards and downwards of a uniform rod of length
4m .Calculate the couple.
2) A uniform metre rule is balanced at 35cm mark, when weighs of 80gf and 15gf are suspended at
5cm and 75cm mark respectively. Calculate the weight of the metre rule.
3) A couple of 25N force acts on a rigid body, such that arm of couple is 75cm .Calculate the moment
of couple in S.I system.
4) Explain – The handle of the door is always fitted near the free end of the door.
5) How does moment of a force differ from a couple?
6) Suggest two ways by which the stability of a body can be increased.
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