A string is wrapped around a uniform disk of mass M and radius R. Attached to
the disk are four low-mass rods of radius b, each with a small mass m at the end. The apparatus is initially at rest. With your hand you pull the string straight up with some constant force F and while your hand is moving up a distance L, the apparatus moves downward a distance h with an angular speed ω. At this instant, determine the change in translational kinetic energy in terms of
relevant variables provided in the problem statement and g (acceleration due to gravity).

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

Did the proton move into a region of higher potential or lower potential? did the proton move into a region of higher potential or lower potential? because the proton is a negative charge and it accelerates as it travels, it must be moving from a region of higher potential to a region of lower potential.because the proton is a negative charge and it accelerates as it travels, it must be moving from a region of lower potential to a region of higher potential.because the proton is a positive charge and it slows down as it travels, it must be moving from a region of higher potential to a region of lower potential.because the proton is a positive charge and it slows down as it travels, it must be moving from a region of lower potential to a region of higher potential.request answerpart bwhat was the potential difference that stopped the proton? express your answer with the appropriate units.î”v î” v = nothingnothingrequest answerpart cwhat was the initial kinetic energy of the proton, in electron volts? express your answer in electron volts.ki k i = nothing ev request answerprovide feedback

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?