5. The table below lists the masses and velocities of several moving things. Object
Mass (kg) Velocity (m/s)
16 0.4
Dog
Truck
5000
0.5
450
Steel Pellet 0.003
Toy Car
0.51
8.2
Which of the things listed has a momentum nearest that of a 0.145 kg baseball moving at a
velocity of 45 m/s?

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