1. You fire a crossbow bolt straight up at 50 m/s. a. What is the bolt's velocity at the peak of its trip?
b. How long does it take (i. e. how much time) until it has zero velocity?

r = ρ x length / area  

ρ = r x area / length  

ρ is in ohm-meters  

in basic units, it is m³kg/s³a²  

i think this is it.

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000

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hope this !