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Freefall: graphs and conceptual questions
Violet throws a ball down from a bridge and it strikes the water below. We can ignore air resistance.
What is true about the acceleration and speed of the ball on its way down?
Assume that upward is the positive direction.

a and b sometimes have a positive value

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.

the speed of the cart after 3 seconds of low fan speed is ⇒ 54.0 cm/s.

the speed of the cart after 5 seconds of medium fan speed is ⇒ 120.0 cm/s.

the speed of the cart after 2 seconds of high fan speed is ⇒ 64.0 cm/s. 

just did the lab.