Calculate the force required to pull a copper ball of radius 3.50 cm upward through a fluid at the constant speed 6.00 cm/s. take the drag force to be proportional to the speed, with proportionality constant 0.950 kg/s. ignore the buoyant force.

F = 15.75 N

Explanation:

given,

radius of copper ball = 3.50 cm = 0.035 m

constant speed = 6 cm/s = 0.06 m/s

proportionality constant = 0.950 Kg/s

mass of the ball

m = ρ V

now, net force acting

F = m g + k v

where k is the proportionality constant.

where density of cooper ball = ρ = 8.92 x 10³ kg/m³

       F = 15.75 N

powerful computers now, not then

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

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