Recent content by rawimpact

what happened to the ω_initial?

IdiskWdisk + ImitchWmitch = IdiskW' correct?

1. Tim of a mass of 50 kg is standing on a large spinning disc of a mass of 80kg and a diameter of 5m. Tim standing at the edge of the disc which is rotating at 25 rad/s. He then walks to the center of the disc. Calculate the new angular velocity of the disc. 2. IW=I'W' IdiskWdisk + ImitchWmitch...

1. A hypodermic syringe contains a medicine with a density of water. The barrel of the syringe has a cross-sectional area of 2.5x10e-5 m^2. A force of 2N is exerted on the pluger (left, larger side). Determine the velocity of the medicine as it emerges from the needle _________...

Ok, I've figured it out, thank you for all of your help. I have another problem, should i continue that here or start another thread?

Well since it is exposed to the atmosphere, isn't it atmospheric pressure? 1.01x10^5 Pa?

Can you please explain the equation, i do not understand it so i really do not know what the velocities are

So the equation is: P1 + 1/2PY1 = P2 + 1/2PV2^2 Correct? Where do i go from here?

1. A large tank isopen to the atmosphere and is filled with water. A small hole is 16m below the surface of the water. If the flow rate of the water is out of the hole is 2.5e^3 m^3/min, calculate: a)the velocity of the water as it leaves the hole and b) the diameter of the hole. 2. Let's say...

Thanks Doc

Yeah, impossible to have elastic collision. Elastic collision = bad because KE is conserved and we would be bouncing back pretty fast! That's why car manufacturers have crush zones to help reduce KE into other forms of energy including heat.

Vave=dX/dt Vinst. = X/t

correct

1. A block of mass 1.3kg is resting at the base of a frictionless 40-degree ramp. A bullet of mass 50g is traveling parallel to the ramp's surface at 250 m/s. It collides with the block, enters it, and exits the other side at 100 m/s. How far up the ramp will the block travel...