The metric unit is the Newton (N), or the 
How quickly can the nervous system relay messages ?
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Speed is a scalar quantity indicating how fast an object is moving, defined by the equation
Explanation:
Speed is a scalar quantity which tells how fast an object is moving, regardless of its direction.
The speed of an object can be calculated as follows:
where
d is the distance covered by the object
t is the time interval taken by the object to cover that distance
The SI units of the speed is the metre per second (m/s).
Speed must not be confused with velocity, which is instead a vector quantity, given by
where displacement is a vector measuring the distance in a straight line between the initial and final position of the object. Since velocity is a vector, the direction matters, therefore an object can have different speed and velocity. For instance, an object completing a full circle has non-zero speed (because the distance covered is non-zero), but its velocity is zero (since the displacement is zero, because the object returns to its starting position).
Learn more about speed and velocity:
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To solve this problem we will apply the concept of drag force which is described as half the product between the density, the drag coefficient, the area and the squared speed. Said expression mathematically is equivalent to,
Here,
= Density
= Drag coefficient
A = Area
v = Velocity
Our values are,
Replacing at the previous equation we have that,
Energy can be described through the work theorem, which is the product between force and distance traveled. So,
Therefore the thermal energy is 20.084kJ