Question

5. A baseball thrown vertically up in the air experiences a drag force proportional to the square of its speed. In terms of g, calculate the acceleration of the stone when its speed is half its terminal speed and (a) When it is moving up [8 points] (b) When it is moving back down

Answer 1

drag / while upward moving the drag is halso downwards ;-se the kenditen func net force = will not happen I enlss we assume that the initial velocity given to the stone yoy VI uso when the object will move downwards drag t w then there is chance of getting not force to The terminal velocity is defined as O net-force et veloiety of eq - I ma = mg-bu²l Fdrag & u² = buz 6 t constant mg = buz - 1 NT = 1 mg b . cunswer to part ① - if Ve) VT eq. of motion for upward case. ma = - mg - by?_ at that moment when v V7/2 - ma = - mg-b VT? 4 -g-g -58 7 a = -g-b.mg =-g- a = - 59/41 lsward case. Y4 4 6 for down cucurd case it will be o' as stated in e