Recent content by rzlblrt417

Homework Statement given the: Intensity = .026 W/m^2 Distance = 4.3m How much sound energy does the source emit in one our if its power output remains constant Homework Equations Pmax = sqrt ( uF(w^2)(A^2)) The Attempt at a Solution I don't even know where to start and that is...

OH! ok so then after plugging everything in i got 71.6N!

ok so then p1 = (3.00)(10)cos(30) p2 = (3.00)(10)cos(60) so p2 - p1 = -14.133 so then it would just be 14.133N? or is it sin(30) making it 14.5N

14.7n?

the same thing for p1 as p2?

*by wall on the ball

My apologies, I always do that. Force on by the wall on ball

Homework Statement a ball hits a wall at 60 degrees from the wall and leaves the wall at 60 degrees. v1 = 10 m/s v2 = 10 m/s m = 3.00 kg t = 0.200s Homework Equations p = mvcos(angle) J = p2 - p1 The Attempt at a Solution p = (3.00)(10)(cos(60)) p1 = 15 p2 = 15 and...

Homework Statement A factory worker pushes a 30.0 kg crate a distance of 4.5 m along a level floor ata constant velocity by pushing horizontally on it. The coefficient of friction is .25. I have been trying and i can't figure out how to solve this problem. Every attempt i make is dead...