Recent content by randomkent

Thanks a lot cepheid! I didn't even think of the inclined plane force diagram, silly me :p All the best.

Homework Statement http://puu.sh/2fjvF If a ball rolls off a ramp like in the diagram, what happens in terms of vertical and horizontal components? Neglecting all friction etc, I understand the horizontal component would not change, but what happens when it comes off the ramp? Does the...

Yeah, I guess that is the only way for it to be correct; if it was partially elastic. If we ignored "the car has a velocity of 13m/s affter the collision" and said they both moved at 13.125m/s, 4218J would be lost which is not that much more than 4200J, but that's irrelevant anyway... However...

Homework Statement Q5. A 1500kg car is traveling east @ 15.0m/s, when it crashes into a 2500kg truck traveling in the same direction @ 12m/s. The car has a velocity of 13m/s affter the collision. Assuming this is an inelastic collision, determine: a) speed of the truck just after the collision...

Are you sure? I was unsure about that because it doesn't account for transferred energy..

So would it be 2 separate answers for a, 100 000J for the water and 840 000J for the pan? Or would it be 500*5*(60-T) = 4200*5*(60-20) Or does the correct method derive one answer... I'm seriously lost .-.

Homework Statement A saucepan of thermal capacity 500J/degC contains 5kg water at 20 degrees celsius. How much energy is required to raise the temperature of the saucepan and water: a) to 60 degrees b) by 60 degreesHomework Equations Q = mcΔt mcΔt = mcΔt The Attempt at a Solution First I just...