Levers & Gears Flashcards

All 5 cards in this deck

What do a simple lever and a simple gear system both do?

They transmit the rotational effects of forces.

How does a simple lever act as a force multiplier?

The effort is applied at a large perpendicular distance from the pivot, giving a large moment, which produces a larger force on the load acting at a smaller distance from the pivot.

In a pair of meshed gears, how does the direction of rotation of the second gear compare with the first?

It rotates in the opposite direction.

What happens to the moment and the speed of rotation when a small gear drives a larger gear?

The larger gear turns with a larger moment but rotates more slowly.

Its teeth are further from its axle, so the distance is greater.

True or false? A gear system can change the direction of rotation but cannot change the size of the moment.

False. Gears of different sizes also change the size of the moment transmitted.