a person Travels along a straight road for half the distance with a velocity and the remaining half distance with another velocity what is the average velocity
Answers
Let Let T be the time taken by the person to cover complete distance.
Case I:
let x1 be the half distance covered.
speed=v1
time taken to cover the first half of the journey :
t1=distance/speed
=(x/2)/v1
Case II
let x2 be the half distance covered.
speed=v2
time taken to cover the second half of the journey :
t2=distance/speed
=(x/2)/v2
Total time=T=t1+t2
=x/(2v1)+x/(2v2)
T=x/2[1/v1+1/v2]
=x[v1+v2]/2v1v2
Average Velocity= Displacement/ total time
=x/x[v1+v2]/2v1v2
=2v1v2/(v1+v2)
∴Average velocity is given by 2v1v2/(v1+v2)
Answer:
contractile vacuole: regulatory organelle usually spherical y found in fresh water protozoa and lower metazoans such as sponges and hydras that collects fluid from protoplasm periodically empties it in to the surrounding medium sorry I have answered to wrong question