Recent content by BoostAdiction

Just made a guess on it :D. I can't find the radial acceleration in circular motion...all i found was the derivative of omega/derivative of t

Woot! So in this case...PE=KE and KE = 5rad/s x .392m x .1 rad which equals, .196 J meaning PE does as well..Hopefully. I am going to assume the acceleration is... 0.5 rad/s^2?

I have feel like mgh should equal KE because KE is energy in motion and the max potential of a pendulum would mean that its not moving right? As its about to swing the other way?

Homework Statement Suppose that a simple pendulum consists of a 50.0 g bob at the end of a cord of negligible mass. The angle (theta) between the cord and the vertical is given by: (theta)=(0.01000rad)cos[(5rad/s)t ], where t is time. A. What is the pendulum's length? B. What is the pendulums...

Well the acceleration has to be greater than 9.8 to have an upwards effect on the ball...So would i take .4 x 9.8 to get the force due to gravity?

haha, good ole' wiki. there's a force due to gravity pushing down on it, and one pushin up (buoyancy force) and I think the net upward force is that buoyancy force...

So it has an acceleration in the positive direction. I understand that much, then its all a lil fuzzy

If you set the ball below the surface to be 0, then the potential energy is 0. Thus, the ball at the surface has a potential energy equal to mgh. Both m and h are unknown. And thanks for the welcome!

[SOLVED] Pressure on a ball Homework Statement Suppose you release a small ball from rest at a depth h below the surface of water. The ball shoots upwards above the surface by 1m. If the density of the ball is .400 that of water and drag force on the ball from water is negligible, at what...