A rocket is travelling vertically upwards. Three vertical forces act on it.
The thrust acts upwards and is equal to 100 000 N.
The weight acts downwards and is equal to 80 000 N.
What is the air resistance force acting on the rocket when it is travelling upwards at a constant speed?
20 000 N downwards
2 )
20 000 N upwards
3 )
180 000 N downwards
4 )
180 000 N upwards
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