Physics for IGCSE & O level - The Earth In Space (Section 10 - No. 6)
A lorry with a mass of 3000 kg has 100 kJ of energy in its kinetic energy store. Calculate the speed of the lorry.
2.5 m/s
8.0 m/s
8.1 m/s
30 m/s
Explanation
Use the kinetic energy formula KE = 1/2 * mv^2.
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