Welcome

It is highly recommended that you have Javascript enabled; many features will not work unless you do. The recommended browsers are Firefox and Chrome; the board is also NOT mobile-friendly.

If you were referred by someone (ex. me, Jessica) please put their username in the referral box on the registration page. Ask them if you don't know their username.

If you are visiting for TESTING PURPOSES ONLY, this is the test account information:

Test

Select a forum to post in:

Science topics

Moderators: Jessica, Teachers

Looking for a topic?
View the Science Topics Directory to find topics quicker under different kinds of science.

The mechanical advantage is the number of times a machine multiplies your effort force.

To find the MA of a machine, you can divide the resistance force by the effort force. Most of the time the resistance force is the weight of the object in Newtons.

To find the MA of a lever, divide the effort arm length by the resistance arm length.
MA = effort arm length / resistance arm length

QUESTIONS

1. What is the length of the resistance arm?

2. What is the length of the effort arm?

3. What is MA of the see saw above?

4. What is the resistance force in the diagram?

5. How much effort force would be needed to overcome the resistance force?

6. Is this a first, second, or third class lever?

[/hr]

Mechanical Advantage of a Pulley System

The MA of a pulley is equal to the number of supporting ropes.

Find the MA of each

1.

2.

3.

[/hr]

Mechanical Advantage of an Inclined Plane

To find the MA of an inclined plane, divide its length by its height.

QUESTIONS

1. What is the height of the inclined plane?

2. What is the length of the inclined plane?

3. What is the mechanical advantage of the inclined plane?

4. How much effort force would be needed to push the dump truck up the mountain?

• 0

Tales of Ostlea :
Dragon Cave :
Magistream :

Jessica
Board Owner
Topic Author

Sapphire

Posts: 3,470
Topics: 1,244
Articles: 30
Joined: December 22nd, 2010, 8:04 pm