The formula for calculating viscous friction coefficient b is: b = (F/m) / (v/t), where F is the force applied, m is the mass of the object, v is the velocity of the object, and t is the time the force was applied.
The force can be measured using a force sensor or a spring scale. The object should be placed on a frictionless surface and the force is applied in the direction of motion. The value of the force should be recorded in newtons (N).
No, the viscous friction coefficient b cannot be negative. It is a measure of the resistance to motion caused by the interaction between the object and the surrounding fluid. A negative value would indicate that the fluid is assisting the motion of the object, which is not possible.
The mass of the object has a direct relationship with the value of b. As the mass increases, the value of b also increases. This is because a heavier object will experience more resistance from the surrounding fluid compared to a lighter object at the same velocity.
The units for the viscous friction coefficient b depend on the units used for force, mass, velocity, and time in the formula. Commonly used units include Ns/m (newton-second per meter) or kg/s (kilogram per second).