1. If the potential energy of a spring is V on stretching it by 2 cm, then its potential energy when it is stretched by 10 cm will be
(a) V/25 (b) 5V
(c) V/5 (d) 25V
Answer-d
(4)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (118)
(a) 34 J (b) 70 J (c) 84 J (d) 134 J Answer-d (202)