if a sample of 4 energy bars is selected, what is the probability that the sample mean amount contained is less than 42.945 grams?

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

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

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little