A baseball is a solid
sphere of radius
0.0372 m and mass 0.150 kg. A
pitcher exerts a force tangent to the
edge of the ball and causes an
angular acceleration of 2380 rad/s2.
How much force did he exert?
[?] N

Write the equation for momentum, first using symbols for the variables, then using words for the variables.

Imagine that you have two balloons (or, better yet, actually inflate two balloons, if possible). create static electricity around one of the balloons by rubbing it against your hair or your sweater and then bring that balloon close to the other balloon, which has not been charged. try this with at least one other object—and for variety in the discussion, avoid using an object already described by your classmates. then, for your initial post to the discussion, answer the following questions: what happened with the two balloons?

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system