Mechanical Advantage + LIFTS Practice Test

When forces are UNBALANCED an object will...

• Move

• Not move

When forces are BALANCED an object will...

• Move

• Not move

How do UNBALANCED forces cause an object to change?

• Change the speed of its motion.

• Change the direction of its motion.

• Change the complexity of its motion.

• Change the speed and direction of its motion.

What is a mechanical advantage?

• Advantage gained by the use of a mechanism in transmitting force.

• A measure of the ratio of output force to input force in a system.

• Something to make your robot better.

• All answers are correct.

What do you call a mechanism made up of two or more gears?

• Mechanical Advantage

• Gear ratio

• Gear train

• Pedal

What is the center of mass?

• The point on the object where force is applied so that it moves without rotation.

• The point on the object where force is applied so that it moves with rotation.

• The point on the object where mass is applied so that it moves without rotation.

• The point on the object where gravity is applied so that it moves without rotation.

What do you call the gear that is doing the turning FIRST?

• Driven gear

• Driving Gear

• Compound gear

• Output

What do you call the gear that is being turned by the first gear?

• Driven gear

• Driving Gear

• Compound gear

• Input

What is the formula for calculating a gear ratio?

• Output divided by input

• Input divided by output

• of Driving Gear Teeth divided by # of Driven Gear Teeth

• Output multiplied by input

What will happen when you have a system with a driving gear that is smaller than the driven gear?

• Make it faster

• Have less pushing ability

• Increase speed

• Increase torque