The officer is describing the motorcycle's acceleration
That is, he's describing how the motorcycle's velocity changes when compared to the time. That's the formula for calculating the average acceleration of any body.
Active Optics.
Hope that helps, Good luck! (:
Answer:
N2- N1 =
V g
Explanation:
Let's use for this exercised the equilibrium relationship
∑ F = 0
N -W = 0
N = W = mg
Let's use density redefinition
ρ = m / v
m = ρ V
N₁ = (ρ V) g
Repeat for when the liquid is submerged, in this case an upward thrust appears as a result of the water dispensed (rgow)
N₂ + B - W = 0
N₂ = W - B
B =
g
= m / V
=
V
N = ρ V g -
Vg
N2 = N1 +
V g
N2- N1 =
V g