If a boomerang is thrown 20 m in a straight line and returns exactly at the same spot from which it is thrown, what is its displacement? a) 20 m
b) 40 m
c) 0 m
d) -20 m

C) 0m

Explanation:

Since at the end of the day, it was not displaced

Displacement ti's a vector quantity

force is mass*acceleration.

we have a very small mass: 11.4*0.001 kg

if we want 0.035n of force, we need an acceleration:

0.035 = 11.4*0.001*a

a = 0.035/(11.4*0.001) m/s^2

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.