Give an example of each class of lever in a human body.

Give one example of each domains.

Figure below shoes the use of a lever. (a) State the principle of moments as applied to the above lever. (b) To which class of lever does it belong ? Give an example of this class of lever. (c) If FA=10 cm, AB=490 cm, calculate: (i) the mechanical advantage, and (ii) the minimum effort required to lift and load (=50N).

The MA of a class-one lever is

Class-two levers

Give an example of a polygenic trait in humans.

Give one example each of a class I lever where mechanical advantage is (a) more than 1, and (b) less than 1.

The diagram below shows a claw hammer used to remove a nail : (i) To which class of lever does it belong? (ii) Give one more example of the same class of lever mentioned by you in (i) for which the mechanical advantage is greater than one.

The diagram alongside shows a claw hammer used to remove a nail : Give one more example of the same class of lever mentioned by you in (i) for which the mechanical advantage is greater than one.

The diagram below shows a rod lifting a stone. (a) Mark position of fulcrum F and draw arrows to show the directions of load L and effort E. (b) What class of lever is the rod ? (c) Give one more example of the same class of lever stated in part (b). .

Give an example each of a molecular solid and an ionic solid.