I'm not sure, I think it's option A.
Let me know if I'm wrong!
Answer:
475
Explanation:
Cori does not exert any more force than 475 J, so 475 is the answer.
Velocity = 14 m/s
Time = 20 s
Displacement = Velocity×Time = (14×20) m = 280 m
The displacement is 280 m towards the direction of motion.
Frost will disturb the smooth flow of air over the wing, unpleasantly
distressing its lifting competence. In other words, this spoils the even flow
of air over the wings, by this means decreasing lifting capability. Also, frost
may avoid the airplane from becoming flying at normal departure speed.
When there was know life on the earth