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CBSE Class 9 Answered

What should be the mass of a bullet if it's speed is 100 m/s and possesses a kinetic energy of 0.1kJ?
Asked by nishasaumitya | 03 Nov, 2018, 01:55: PM
answered-by-expert Expert Answer
Kinetic energy K = (1/2)×m×v2 .....................(1)
 
where m is mass of the bullet and v is speed of bullet.
 
hence from eqn.(1), we write m = 2K / v2 = (2×0.1×1000)/(100×100) = 0.02 kg  = 20 gram
Answered by Thiyagarajan K | 03 Nov, 2018, 09:10: PM
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