Q

Find the work required to increase the speed of an 800 kg car from 5 m/s to 10 m/s.

RRB Group D 22/09/2018 / Shift-II 2018
✓ Answer: A 30 kJ
W = ΔK = (1/2) × 800 × (10² - 5²) = 30000 J = 30 kJ.
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