Aparticle with rest mass m moves with speed 0.6c. its kinetic energy is …… a. 0.18mc2 b. 0.22mc2 c. 0.25mc2 d. mc2

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

An object has a weight of 500 on earth what is the mass of this object

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f