11.7.1. Friction Models

Try these first

1. 1.

   What is static friction?

   Hint

   Think about motion status.

2. 2.

   Describe viscous friction.

   Hint

   Connect this to speed.

3. 3.

   What type of friction opposes the start of motion?

   • Static Friction
   • Viscous Friction
   • Kinetic Friction

   Hint

   Think of a stationary object trying to move.

4. 4.

   True or False: Viscous friction decreases as speed increases.

   • True
   • False

   Hint

   Consider how liquids behave.

5. 5.

   A robotic hand attempts to lift an object weighing 5kg from a resting position. Calculate the initial torque if static friction is 3 Nm, and viscous friction coefficient is 1 Nm/(m/s) with a speed of 0.2 m/s.

   Hint

   Consider static friction as constant at rest.

6. 6.

   In a system where both static and viscous frictions must be balanced, what happens if the robot's speed exceeds the limits of these frictions? Describe and compute an example scenario.

   Hint

   Examine how values correlate under different conditions.