Recent content by Xenekaro

Ok thanks for the explanations! I just have 1 more question. Say if I want to compare: Fd=m(a+g) and Fd = 0.5pv2acd Would the velocity in the second equation have to be the average or instantaneous velocity? Average velocity refers to the mean of initial and final velocity which I...

Ya, I was worried about this. So supposing I know that the (mass*deceleration) value is x and the weight of the object is y. Would the drag force be x+y? Or are there other factors to be considered? I find the drag force calculations to be too simple to actually warrant the need to formulate...

ok awesome. I thought F=ma was only valid for terminal velocity so I was wondering about the drag equation.Thanks again guys!

For the motion of a spherical ball under water, can its drag force be calculated by knowing only its mass and deceleration?

Real experiment. For my Independent research lab for IB Physics HL. Yes there was cavitation-if u mean splash. But I am trying to ignore the physics of the bullet before or at the point of striking water. I want to concentrate only at the time when the bullet enters water and experiences drag...

Basically, BB ammos were shot from an airsoft gun into a water filled tank. The experiment was recorded using a video camera. I can calculate the approximate instantaneous velocity of the bullet under water at a given time using Logger Pro. 1. Relevant equations Drag force = 0.5 ρAC0v2 2...