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