Final Assessment

Systems at Work

Components and ForcesExamine this system.

a) List three components of the system.

b) Find an example of a contact force and an action at a distance force that work within this machine.

c) Find two simple machines in the system

d) Explain how each simple machine reduces force

Weight vs. MassAt a boxing match, the two opponents wait in opposing corners. As they stare at each other, the ring announcer proclaims that challenger weighs in at 105 kg. He claims the champion weighs in at 110 kg.

a) Why is the announcer wrong? Explain.

b) If this boxing match took place on the moon, how would the mass and weight of each man change?

Work The ant carries a branch up a

hill. He travels 2.5m using a force of 0.6N. The hill has a vertical height of 1.8m.

Mark pushes this tree for 26 min using a force of 1050N.

How much work has each individual done?

Show your work

Mechanical Advantagea) Complete the chart to explain the way that this particular machine works.

b) If the in Input Force is 12 N and the Output Force is 108 N what is the mechanical advantage?

Designing with Simple MachinesThis is a replica of the famous Temple of Artimis which was built in 550 BC, way before the invention of any modern machinery.

Using your knowledge of the six simple machines, explain how the temple might have been built.

The Value of SystemsWeight the advantages and disadvantages of this system.

Is it a valuable system in our society?