Question

The velocity of a body becomes 4 times and its mass becomes half. The Kinetic energy becomes :
(1) 8 times
(2) 6 times
(3) 2 times
(4) 16 times

Answer 1

Explanation:

V वेग और m द्रव्यमान पर गतिज ऊर्जा = 1/2 mv²

जब वेग 4 गुना और द्रव्यमान आधा हो जाऐ तो गतिज ऊर्जा

= 1/2 *m/2 * (4v)² = 1/2 * m/2 * 16v²

= 8 * 1/2*mv²

वेग 8 गुना हो जाएगा ।