Save
or

or

taken

Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.

focusNode
Didn't know it?
click below

Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size     Small Size show me how

basic mechanics 2

basic mechanics chapter 2

There are ______________ classifications for the different typers of levers. Three
The location of the lever fulcrum in relation to the load and applied fore determines the _________________ of levers. Classification
A lever which has the fulcrum between the applied force and the load is called a ___________-____________ lever. First-class
A lever with the fulcrum located at the end of the bar can have either a __________-_________ lever of a ____________-_____________ lever. Two; second-class; third class
When using a first-class lever, the amount of weight or force and the _______________ fromthe fulcrum can be varied according to the need. Distance
In order to have a balanced state with a first-class lever, the___________ on one side of the fulcrum times the distance from the ____________ on that side must equal the ____________ on the other side multiplied by its__________ from the fulcrum. weight; fulcrum; weight; distance
if a maintenance mechanic desires to lift a 200 pound generator off the ground using a lever as the lifting device, he must place a fulcrum under the lever, If a fulcrum is placed three feet from the end of the liver lifting the generator, and the leveris 120 pounds; exactly 120 pounds would only balance the lever
Second-class levers always have the load attached between the ___________ and the __________. Fulcrum; applied force
Second-class levers are normally employed to provide a mechanical _____________ when attempting to lift a load. advantage
After attaching a load to a second-class lever, you find you have sufficient force to lift the load, but cannot raise the load high enough to get a dolly under it. To correct this situation, you should move the load____________ toward the __________. Outward: applied force
After attaching a load to a second-class lever, you find you have sufficient force to lift the load, but cannot raise the load high enough to get a dolly under it. To correct this situation, you should move the load____________ toward the __________. Outward: applied force
If a load weighing three pounds is attached on inch from the fulcrum of a six-inch second-class lever, how much force is required to lift the weight? 0.5 pounds (3x1 = 3 and 0.5 x 6 = 3)
The applied force of a third-class lever can never be __________ than the force exerted by the load itself. less
Third-class levers provide a mechanical advantage in that they can vary the __________ and ___________ that a load moves. speed; distance
The greater the distance between the applied force and the fulcrum, the ___________ speed of movement the load will have. less
The closer the applied force is to the fulcrum of a third-class lever, the ___________ the distance in travel of the load. Greater
The steering Wheel of an automobile is a good example of a ______________ or _________-__________-___________ machine. Crank; wheel and axle
The wheel-and-axle machine works much on the same principle as that of a _____________. Lever
Torque is determined in a simple wheel-and-axle machine by Multiplying the __________ ______________ times the ______________ from the center of rotation. radius; axle
gears can be used to ________ or ________ force, increase or decrease _______________, or change the _____________ or motion. magnify; reduce; speed; direction
When a force is applied to the smaller of two gears, the resultant output speed will be _____________. decreased
Dividing the number of teeth on the driver gear by the number of teeth on the driven gear will determine the multiplier for computing an increase of decrease in ______________. speed
Dividing the number of teeth on the driven gear by the number of teeth on the driver gear will determine the multiplier for computing an increase or decrease in ___________________. Touque or force
A particular gear arrangement that provides for a reduction in speed of applied force will have the effect of _____________ the amount of force applied. increasing
A gear arrangement that provides for an increase between input and output force will also have the effect of ___________ the speed of the applied force. Decreasing
Gears (do/do not) _________ need to be of different sizes to cause an increase of decrease in speed and / or force. do
Gears (do/do not) __________ need to be of the same size to cause a change in direction of applied force. Do not
An inclined plane is primarily used to reduce the force necessary to ___________ or ___________ a weighted object. Raise; lower
If a ramp is six times as ling as it is high, the mechanical advantage of using the ramp is _______________, six
Computer the force necessary to roll a barrel weighing 500 pounds up a 15 foot inclined plane to a height of 6 feet. How much force is necessary? 200 pounds ( 500 x 6 = 3000 and 3000 divided by 15 = 200
To multiply the length of a jack handle by 2 x 3.14, you are determining the radius of a jack handle are, You can use this figure to determine the ______ _______ of the jack by further dividing this product of 2 P;R by the pitch of the jack screw. Mechanical advantage
Determine the lifting capabililty of a screw jack that has a 100-pound force applied to a 36-inch jack handle. Assume the screw pitch of the jack to be 1/8 inch. Also assume that the construction of the jack is such that it will not collapse under the str approximately 30.4 tons (2x 3.14 x 36 divided by 1\8 (or .125) = 1808.64 x 100 divided by 2000=90.4 approximately
Created by: playboygangster

Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

• SPACEBAR - flip the current card
• LEFT ARROW - move card to the Don't know pile
• RIGHT ARROW - move card to Know pile
• BACKSPACE - undo the previous action

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
 "Know" box contains: Time elapsed: Retries:
restart all cards