Recent content by euphoriax

But before the mass is released it's still being compressed 0.3m, and then after it moves up 0.2m. I tried that anyway, and it wasn't the correct answer...

Homework Statement A hockey player of mass 8.0x10 kg was skating at a velocity of 7.5 m/s [E] when he accidentally hit a linesman who was just standing on the ice. The mass of the linesma is 9.0x10 kg and his velocity after the collision was 3.0 m/s [N30°E]. a) find the velocity of the hockey...

Homework Statement A spring, having a force constant of 6.0x102 N/m, is held in a vertical position and compressed 0.30m. A 5.0 kg mass is then placed on top of the spring. THe mass is then releases. Neglecting air resistance and the mass of the spring, calculate: a) the velocity of the...

oh, I see. Thanks!

Oh, I see. So if the question mentions the landing elevation, like the first one did with the plain, then i must use the trajectory equation and the quadratic formula, but if it doesn't state that and only to the apex, then i must find the time to the apex and then multiply by two to find the...

yeah since it was only half the trajectory, i had to multiply the time i found for the first half by 2 to find the time for the whole thing so i can use it in the equation to find the horizontal range. but i wanted to know how come for one question you had to multiply the time by 2, and for the...

But then sometimes you don't multiply it and just use the time you found from the vertical... So here's an example: A mortar shell is fired at 80m/s at an angle of 65 degrees to the horizontal and falls on a plain 50m below the level of the hill from which it was fired. What is the horizontal...

Homework Statement When I'm solving problems, I'm told that the time between the vertical and horizontal components are the same. So that means that I would have to use the same time when calculating for both the vertical and horizontal components right? But then there are times when i have...

Homework Statement A gun fires a shell with a speed of 315m/s. Neglecting the effects of air resistance, calculate the maximum range of this gunHomework Equations t=(vf-vi)/a v=d/t The Attempt at a Solution it doesn't give me an angle so I am kind of confused on how to solve this problem. I...

Homework Statement Three charges A, B and C with charges respectively +3.2 x 10-6 C and -7.8 x 10-6 C are placed as seen in the diagram. What is the force on B because of A and C? Homework Equations FE=kq1q2/r2 The Attempt at a Solution dAB = 2.5m dCB= 1.5m k= 9.0x109...

Oh, that's true. thank you!

Homework Statement A magnesium surface has a work function of 3.68 eV. Electromagnetic waves with a 215 nm wavelength strikes the surface and eject photoelectrons. Calculate the energy of the photoelectrons in Joules and in electron volts. W= 3.68 eV = 5.96x10-19 J wavelength= 215 nm =...