Here is the problem:
Calculate the force exerted on a rocket, given that the propelling gases are expelled at a rate of 1500kg/s with a speed of 4*10^4 m/s (at the moment of take off)
I know that force is equal to the mass times the change in velocity over the change in time. Can I use a...
so mgh=1/2mv62 and then I could solve for v and finally solve for kinetic energy?? Or are you saying that the amount of potential energy that I found is the amount of kinetic energy?
ok so the potential energy would be U=mgh which would be (2.0kg)(9.8m/s^2)(-0.42m)...but I guess I still don't understand how this plays into the kinetic energy?
Alright I'm having a little trouble on this one...
One end of a massless spring is welded to a flat surface; the other end points upward. A mass of 2.0kg is set on top of the spring. The spring is then compressed by hand so that the end of the spring is 42cm lower than the position of the...
alright I hope I am understanding this correctly...from what I understand that your telling me the force is just the 1.0kg? if that is correct I though force had to be in Newtons?
I need a little help on this one:
One end of a massless spring is welded to a flat surface, the other points upward. A mass of 1.0kg is gently set down on top of the spring until the spring is compressed by 17cm to a new equilibrium position. What is the spring constant?
I know that you...
Having a little trouble with this one:
A 4kg mass is attached to a spring and executes simple harmonic oscillation with a period of 1.50s. The total mechanical engery of the system is 12J. What is the spring constant. Determine the amplite.
I was able to find the amplitude which is 0.585m...
a small object is placed 10cm from the center of a phonograph turntable. it is observed to remain on the table when it rotates at 33 1/3 rev/min but slides off when it rotates at 45 rev/min. Calculate the centripetal force.
if anyone has any ideas what so ever they are greatly appreciated...