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Syllabus
1)Fire tongs, forceps ,nutcracker ,see-saw.
1.forceps
2.lock and key
3.pliers
4.A fishing rod
5.A nut cracker
6.see-saw
end at a distance of 90cm from the load. Find the following:
(i) The length of the load arm.
(ii) The length of effort arm.
(ii) The mechanical advantage of the lever.
1)FORCE OF FRICTION PRODUCES LIGHT ENERGY.
2)A HAND GRINDER IS AN EXAMPLE OF A PULLEY.
3)A KITCHEN KNIFE IS AN EXAMPLE OF LEVERS OF THIRD ORDER.
FILL IN THE BLANKS:
1)Machines help us to apply force at a _________ point.
2)The force applied on a machine to do some mechanical work is called_________.