6.2 Guided Notes: Work and Power

1.) _______________ is the rate at which energy flows or at which ______________ is done. (Page 135)

• Work/power
• Power/work

2.) Work is a form of energy that comes from _______________ applied over ____________. (Page 135)

• force/distance
• distance/force

3.) When work is done by stretching a rubber band, what happens to the energy of the rubber band?

• The rubber band has increased kinetic energy.
• The rubber band has decreased kinetic energy.
• The rubber band has decreased potential energy.
• The rubber band has increased potential energy.

4.) In both the video and Figure 6.8, it is explained that the energy the rubber band receives from being stretched can be transferred to another object, like the paper planes. This converts the rubber band's energy into what type of energy that is noticeable in the paper planes?

• potential energy
• kinetic energy
• sporadic energy
• No energy is converted. The rubber band keeps all of its energy.

5.) Work is only done when forces cause motion. (Page 136)

• True
• False

6.) How do you calculate the work done by a force? (Page 137)

• Work equals force subtracted by distance.
• Work equals force multiplied by distance.
• Work equals force divided by distance.

7.) Even if an object doesn't have energy, it still has the ability to do work. (Page 137)

• true
• false

8.) Which units are used when measuring power?

• Newtons, meters, joules
• Watts, time, joules

9.) The watt is equal to 1 joule per second. It is named after which Scottish engineer, who invented the steam engine? (p. 138)

• Joe Watt
• Ray Watt
• James Watt

10.) How did Watt express the power of his engines, which has become a unit of power known as horsepower? (p. 138)

• Watt expressed the power of his engines as the number of dogs an engine could replace.
• Watt expressed the power of his engines as the number of deer an engine could replace.
• Watt expressed the power of his engines as the number of horses an engine could replace.