I am having trouble on this problem. An object of mass 10 kg is dropped from a great height. (a) If the object is subjected to air resistance equivalent to 10 times the instantaneous velocity, find the velocity. (b) How far does the object drop after 5 sec? Ok so I thought the equation would be: 10(dv/dt) = 98-10v but when i do the integrating factor or seperable i don't get the answer. Can someone tell me what i am doing wrong.