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Use the circuit diagram below to answer the questions that follow. (a)    What is the resistance of R1? [2] (b)    What is the current through R2? [2] (c)    What is the current through the energy source? [2] (d)    What is the total resistance in the circuit? [2]

A 2.0 m first-class lever has a load of 600 N located 0.5 m from the fulcrum.  (a)    State the Law of the Lever. [1] (b)    Draw a diagram of the lever, showing the load, effort, fulcrum, effort arm, and load. (you do not need to submit the diagram, but it may help you answer the questions) (c)    Determine the effort force needed to balance the load. [2] (d)    If this lever has an actual mechanical advantage of 2, determine the percent efficiency of the lever. [2]

If done long enough, rubbing two sticks together can produce enough heat to start a fire.  If 100.0 J of thermal energy is required to start the fire and the average frictional force between the sticks is 20.0 N, the distance the sticks must slide past one other is:

A 30 kg box is lifted from the ground to a height of 1.5 m.  The work done is:

Which of the following substances would likely have the least laminar flow?   

Unloading valves are commonly installed in hydraulic clamping and bending systems because their cylinders extend and retract their rods, one after another.

Most professional certifications for fluid power technicians are valid for up to ___ year(s), at which time they must be renewed.

Coalescing fi lters should be installed as far as possible from the point of work.

___ valves can be used in hydraulic systems that require a rod to quickly extend to the point of work and then slowly extend once it is at the point of work.

Pseudocavitation occurs when the outlet port of a pump is restricted.