Even more troubling, I still got the answer wrong and it was my last attempt so they just show you how to do it then and my setup actually was correct however the computer did not want to take my numbers (the numbers are individualized for everyone.
Rake I do actually think the right way to do...
Homework Statement
A spring (k = 200 N/m) is fixed at the top of a frictionless plane inclined at angle θ = 40 °. A 1.6 kg block is projected up the plane, from an initial position that is distance d = 0.80 m from the end of the relaxed spring. With what kinetic energy must the block be...
Loonychune, thank you so much you've been of great help.
so to solve
Eqn1. h=(1/2)at2
Eqn2. .42h=(1/2)(9.8)(1)2 + u
Eqn3. u=(9.8)(t-1)
plugging 3 into 2 we get h= (-4.9 + 9.8t)/.42
plugging 2 into 1 we get 4.9t2 + -23.3333t + 11.6667=0
the only good root is t=...
An object falls a distance h from rest. If it travels 0.42h in the last 1.00 s, find (a) the time and (b) the height of its fall.
so I know a=-g
and I believe I need to use v= v0 + at to some extent.
I also believe that they are trying to say that in the last 1s of the fall it traveled...
1. a red car and a green car, identical except for the color, move toward each other in adjacent lanes and parallel to an x axis. At time t = 0, the red car is at xr = 0 and the green car is at xg = 240 m. If the red car has a constant velocity of 21.0 km/h, the cars pass each other at x = 47.5...