Recent content by jaron

wow. yeah i don't know what i was doing before i understand it now. serious brain malfunction. thanks for the help people

Homework Statement a 0.144kg baseball is pitched horizontally at +38m/s. after it is hit by a bat, the baseball moves horizontally at -38m/s. a) what impulse did the bat deliver to the ball b) if the bat and the ball were in contact for 8.0*10^-4 seconds, what was the average force that...

Homework Statement the critical angle for a ray of light leaving an unknown material (surrounded by air) is 32.4'(degrees celcius). the speed of light in the material is: Homework Equations niSin(theda)c = nRSin(theda)R (i am not sure how to make theda symbols on the computer)...

ah yes. so we are back to the old t = d/v that makes very good sense. thank you.

Homework Statement a longitudinal wave in a 6.0m long spring has a frequency of 10.0 Hz and a wavelength of 0.75m. calculate the speed of the wave and the time that it would take to travel the length of the spring. Homework Equations v = f (wavelength) The Attempt at a Solution v =...

ok so are you agreeing with my answers? and yes it was a head on collision, so there are no angles to worry about.

Homework Statement a billiard ball of mass of 0.115kg moves with a velocity of 12.5m/s toward a stationary billiard ball of identical mass and strikes it in a head on collision. the first billiard ball comes to a complete stop. determine whether the collision was elastic. Homework...

i had tried cos 30'(10) = 8.6m but i figured since the actual movement was the horizontal distance you would assume it to be the height (like a horizontal fall)? and with that i just end up getting 9.2m/s for my speed. still wrong

Homework Statement a wrecking ball, with a mass of 315kg, hangs from a crane on 10.0m of cable. if the crane swings the wrecking ball so that the angle that the cable makes with the vertical is 30', what is the potential energy of the wrecking ball in relation to its lowest position? What will...

i understand. thank you

only gravity (in this instance because it says to neglect friction)

neglecting air friction, neither.. meaning mass doesn't matter

Homework Statement you throw a ball directly upward, giving it an initial velocity of 10.0 m/s. neglecting friction, what would be the maximum height of the ball? (explain why you do not need to know the mass of the ball) Homework Equations now the problem itself i understand. we...

Homework Statement the spring in a typical hooke's law apparatus has a force constant of 1.50 N/m and a maximum extension of 10cm. what is the largest mass that can be placed on the spring without damaging it? Homework Equations what i believe to be relevant: F=-kx W=F"d E=mg(h)...

yeah, thanks. i feel like an idiot about the question now.. forgot to consider that fact that the 30m was for the whole height and not for floor 6-8.