Calculating the IMA of a Simple Machine

1.    A ramp that is 5 m long is used to raise an object 2 m vertically. Find the IMA of this ramp.

2.    The handle of a screwdriver has a radius of 3 cm. If the shaft of the screwdriver has a radius of 0.5 cm, what is the IMA of the screwdriver when used to tighten a screw?

3.    Wei uses a pulley system to lift a box. She pulls the rope a distance of 3 m, suing a force of 50N. If the work done on the box is 120J, what is the efficiency of the pulley system?

4.    Define “simple machine”

5.    Explain how a lubricant affects the efficiency and the frictional forces of a machine

6.    Explain why a machine or a mechanism cannot have an efficiency of 100%

7.    A force of 900 N pushes a wedge 0.10 m into a log. If the work done on the log is 50 J, what is the efficiency of the wedge?

8.    A machine is capable of doing 35 J of work when 50 J of work is put into the machine. What is the efficiency of this machine?

9.    List the six simple machines that you know.

10.                       What is the difference between IMA and MA?