help me in this question of vectors

Question

anonymous · Answer

attachment

amistre64 · Answer

hmm, displacement/time = average velocity is what your last question i helped out stated.

integration gives us the area under a curve, which is also a definition of displacement

anonymous · Answer

attachment

amistre64 · Answer

$$2\int_{0}^{1}\sqrt{1-x^2}dx$$ is my idea

anonymous · Answer

i got this answer from a site but can not understand it

amistre64 · Answer

ok, thats using the standard definition of displacement

amistre64 · Answer

notice that from start to finish the thing is only displaced by 2 units, the negative is a direction .. downward

amistre64 · Answer

displacement / time = -2/1

anonymous · Answer

but it is given only 1 m ? how are -2 m there ?

amistre64 · Answer

its a semicircle with a radius of 1m

the diameter of the circle measures 2m in a down direction, so -2m

anonymous · Answer

oh yes thanks thanks thanks thanks thanks a lot :)))))))))))))))))))))))) gr8 help amsitre , i think u deserve the word SIR

amistre64 · Answer

i spose, its on all the letters i get from the collection agencies :)

anonymous · Answer

nice