Physics for IGCSE & O level - Forces And Motion (Section 10 - No. 7)
A small rocket expels 2kg of exhaust gas every second at a speed of 100 m/s. What is the thrust produced by the engine?
50 N
100 N
200 N
2000 N
解释
Thrust = mass flow rate * exhaust velocity = 2 kg/s * 100 m/s = 200 N