# Homework: Torque and Simple Machines

```Homework: Torque and Simple Machines
1. Look at Figure 14: Is the energy gained by the pins greater than, equal to or less than the energy
lost by the bowling ball?
2.
3.
4.
5.
What is center of mass?
What is axis of rotation?
What is Torque?
The farther the force is from the axis of rotation, the ________________________it is to rotate
and the more ________________ is produced.
6. The perpendicular distance from the axis of rotation to a line drawn along the direction of the
force is called the __________________________________.
Quick (yes you have to do a lab at home) Read through the Quick lab, do the lab, summarize below:
7. Write the equation for Torque in the following space:
8. Is Torque a vector or scalar quantity?
9. Torque is written as negative if the rotation is _______________and positive if the rotation is
_______________________________________.
10. Mechanics often us cheater bars to loosen stubborn bolts. A cheater bar is a length of pipe that
fits over the handle of a wrench to make the handle longer---How does this help the mechanic?
11. Read through sample E and work through the problem here. Don’t forget about using good
problem solving techniques by define givens and unkowns and picking your equation first!!!
Do Practice E problems one and three below:
Types of Simple Machines
1. What is a machine?
2. What are the six simple machines: (pneumonic devise—Let People Wander When the
Party Starts):