Recent content by Tearsandrille

I know that the instantaneous velocity at point B is equal to the average velocity from point A to point C (considering each point is 1 second apart). Sincethe average velocity between to points is equal to the instantaneous velocity at the midpoint. But, that is the only way I know how to do it.

Wait... I think I might get it. If I know the instantaneous velocity on point B, and I know the instantaneous velocity at release (Vi = 0.0m/s) I can use Vf^2 = Vi^2 + 2*a*d. Then all I have to do is minus the distance from A to B to get the distance from release to A!

Oh, I'm sorry. I have five points (A, B, C, D, and E). I know that between each point is 1 second. So, I have measured between each point and used the midpoint method to find the instantaneous velocity at B and D. I know the initial velocity is 0.0m/s, since it is a free fall.

I know the instantaneous velocity at two different points, but I am unsure of how that will help me. So, in theory I could plug stuff into Vf^2 = Vi^2 + 2*a*d, but that will only give me the distance between the two velocities. Which I know already. I also know that I can use Vf = Vi + a*t...

Homework Statement In this problem I don't know the release point/origin of a dropped ball. I do however have a stroboscopic photograph of it moving through my frame of reference. In my frame of reference it moves 2.0m in 4 seconds. Now, I am suppose to figure out how far above the first...

I find sometimes it is easiest to turn this into a branching diagram. You keep creating new branches until you are left with the one compound. Like Simon said, find out what they react with and go from there. Your first branch could be "Does it dissolve in water".

So, what if I wanted to give the angle in compass directions instead of polar? Isn't it always measured from the x-axis of that quadrant?

But, the 56 degrees is reflective of the right triangle I made. So, wouldn't I have to write 34 degrees south of east? I think that is what is confusing me the most.

Homework Statement Can you have a negative angle, or do you just assume absolute numbers? Your coach tells you to turn south for 10.0m and then turn and run east 15.0m. How far must the ball be thrown from where you started to where you ended? Homework Equations a^2 + b^2 = c^2...

I believe that to find how fast they are closing 3.8m/s, which is I believe the relative velocity of one friend to the other. Is this what you were referring to? It does seem to be quicker in that I am skipping the step of setting them equal to each other. TS

I see. The d I was using in the equation is the displacement, but I was treating it as position. If I treat it like position then I should get: x(t) = 65m - 2.6 m/s * t x(t) = 0m + 1.2 m/s * t Since, the position, x(t), of impact will be the same I can set them equal to each other and solve...

Homework Statement How far could you run back and forth at 6.5m/s between two friends who are 65m apart while one friend is running with a speed of 2.6m/s and the other friend is running with a speed of 1.2m/s? Homework Equations v = d/t The Attempt at a Solution If I establish...

No, I did not just copy the equation from the book. I did derive it using the fact that R = Vxinitial*t and t = (2Vosin θ)/g (which I derived from t = (Vf - Vi)/-g) So, the reason that I don't need to worry about the negative when I use the range equation is that I already compensated for that...

Homework Statement A quarterback throws the football to a stationary receiver who is 31.5m down the field. If the football is thrown at an initial angle of 40.0 degrees to the ground, at what initial speed must the quarterback throw the ball for it to reach the receiver, if the ball is caught...

Homework Statement You are driving a car going 30.0m/s; suddenly you see a scary monster 130.0 m ahead. It takes you 0.150s to react before applying the brakes, and the average acceleration during the breaking is 3.50m/s^2. a. Determine if you hit the monster? b. What maximum speed...