Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
11 Cards in this Set
- Front
- Back
|
____ is the movement of an object by a force.
|
Work
|
|
|
The formula for work:
|
Work = Force x Distance
|
|
|
Word Problem:
If you have a box that weighs 25 lbs and you move it 4 feet, what is the work you have done? |
25 x 4 = 100 foot/pounds
|
|
|
If you have a cat (named MeeMee) that weighs 20 lbs and you lift her 4 feet, how much work have you done?
|
20 x 4 = 80 foot/pounds
|
|
|
A ____ is the metric unit for work and energy.
|
joule
|
|
|
You push with a force of 3lbs a stack of books weighing 12 lbs across a 5 ft. table.
|
Because you do not have to lift the box, you only use the force you used and the distance. 3 x 5 = 15 ft/lb.
|
|
|
The rate of doing work (the time it takes you to do a job) is _______.
|
power
|
|
|
What is formula for power?
|
Power = work/time
Power = work divided by time |
|
|
Work is directly related to ___ and inversely related to ___.
|
power
time |
|
|
A horse can lift 550 pounds a distance of 1 foot in 1 second is known as ______.
|
horsepower
|
|
|
A gardener uses 2750 ft-lb/sec of power for plowing a garden. What is the horsepower units? Hint: 1 horsepower equals 550 ft-lb/sec.
|
You divide 1 horsepower which is 550 into the 2750.
2750/550 = 5 |
