Recent content by j_suder2

Thanks, I just had the wrong conversion from tonnes to kg's

Ok so I can find the volume of water, I'm still having trouble finding the height of the displacment, Thanks

Homework Statement A Mississippi river barge is 65m long and 20m wide. How far will it sink into the water when 3000 tonnes of coal is placed on it? Homework Equations rho=m/v, L x W = A, The Attempt at a Solution I figured out the area of the barge in contact with the water...

So how did you determine W was 5997.4?

My conseravtion of energy expression is .5mv^2 + mgh = .5mv^2 This leaves me with two variables, so I am not sure what is next. Thanks.

Ok thanks, I found the height to be 32.8 m (?) at the quarter point, then set KE + PE final to = KE initial and got 25 m/s for an initial velocity. The answer is 21 m/s though. Not sure where I went wrong.

Simple throwing ball "up" problem Homework Statement Ball is thrown vertically with upward velocity of 18m/s when it reaches 1/4 of its maximum height above its launch point. Find initial launch velocity of ball. Homework Equations 0.5mv2, mgh, v=d/t The Attempt at a Solution...

Beautiful. Thanks much!

I should know this, but that still leaves me with unknowns for theta and hypotenuse. I am drawing a blank on how to find the hypotenuse with what is given. Thanks for the replies by the way.

Well I suppose I am stuck then.

I am trying to figure out the distance down the slope that she travels so I can use that along with the height (15m) to find the angle.

Homework Statement A girl starting from rest, toboggans down a hill of height 15m. The mass of the girl and toboggan is 42kg. The speed of the girl and toboggan at bottom of hill is 2.9m/s. If force of friction is 112 N, what is the slope of the hill? Ignore air resistance. Homework...

Thank you, I am still not sure how to find v, we have not done any of these type of questions in class. I have tried making both sides equal to the minus of the other, but come up with the same (15m/s) because the mass is the same. Time is also unknown so I'm not sure. I tried to find the...

Homework Statement Hail stones of mass 0.0650 kg are falling straight down with a speed of 15 m/s when they strike a car roof. If the hailstones bounce to a height of 12 cm above the car, what is the impulse that the car roof imparts to a single hailstone? Homework Equations p=mv J=Ft...