Find the K.E of a ball of mass 200g and the speed of 20 cm/s
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Mass of ball = 200 g
Speed = 20 cm/s
We know,
KE = ½ mv²
⇒ KE = ½ (200 g)(20 cm/s)²
⇒ KE = 100 × 400 g cm²/s²
⇒ KE = 40000 erg or 0.004 J.
∴ Kinetic energy possessed by thr ball is of 4 × 10⁴ ergs.
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