Astudent sits at rest on a piano stool that can rotate withoutfriction. the moment of inertia of the student-stool system is 4.0kg*m^2. a second student tosses a 1.7 kg mass with a speed of 2.7m/s to the student on the stool, who catches it at a distance of0.35 m from the axis of rotation.

what is the resulting angular speed of thestudent and the stool?

= ? rad/s

Aproton is projected toward a fixed nucleus of charge +ze with velocity vo. initially the two particles are very far apart. when the proton is a distance r from the nucleus its velocity has decreased to 1/2vo. how far from the nucleus will the proton be when its velocity has dropped to 1/4vo?

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?