Two particles a and b are initially at distance d apart. they start moving simultaneously at velocity v and u such that a always move towards b and b moves along fixed straight line which is perpendicular to initial direction of motion of a. then particles will meet after time a. (vd)/(v^2-u^2)b. (ud)/(u^2-v^2)c. d/(v^2+u^2)^1/2 d. vd/(v^2+u^2)

Two polarizers are oriented at 70∘∘ to one another. unpolarized light falls on them. what fraction of the light intensity is transmitted?

Aforce of 100 newtons is used to move an object a distance of 15 meters with a power of 50 watts. find the work dine and the time it takes to do the work

Asailboat is traveling to the right when a gust of wind causes the boat to accelerate leftward at 2.5m/s2 for 4s. after the wind stops, the sailboat is traveling to the left with a velocity of 3.0m/s.assuming the acceleration from the wind is constant, what was the initial velocity of the sailboat before the gust of wind? answer using a coordinate system where rightward is positive.