The author’s grandmother was disturbed when he started going to the city school because:
(i) She could not help him with his lessons in English, science. She didn't believe in them.
(ii) No teaching of God and scriptures jn the author's English medium school.
(iii) She was unhappy with the idea of music lessons being given at school. She considered music suitable only for the people with low dignity.
Figure 8.9 shows the strain-stress curve for a given material. What are (a) Young’s modulus and (b) approximate yield strength for this material?

Two identical ball bearings in contact with each other and resting on a frictionless table are hit head-on by another ball bearing of the same mass moving initially with a speed V. If the collision is elastic, which of the following (Fig. 5.14) is a possible result after collision ?
