AR 1.1 - Simple Machines – Gears

What are gears primarily made of?

• Wheels with interlocking teeth

• Pulleys with hanging ropes

• Belts with smooth edges

• Levers with smooth surfaces

When one gear turns, what happens to the direction of the other gear?

• It moves in the opposite direction

• It moves randomly without pattern

• It stops moving completely

• It moves in the same direction

What is another main function of gears besides changing direction?

• Multiplying force or speed

• Reducing efficiency

• Preventing rotation

• Creating friction

What happens when a smaller gear moves over a larger distance?

• It multiplies the force

• It increases friction instead of force

• It reduces both force and speed

• It decreases mechanical advantage

What happens when a larger gear turns a smaller one?

• It increases speed

• It stops the system completely

• It multiplies force only

• It reduces overall speed

Why are gears helpful in fishing reels?

• They reduce the effort needed to pull in fish

• They prevent the reel from turning

• They make reeling slower

• They add weight to the reel

How do gears help in motor vehicle transmissions?

• They control power to the wheels

• They eliminate the need for acceleration

• They prevent fuel use

• They add weight to the car frame

How do gears improve industrial machinery?

• By managing speed and force

• By converting electrical energy directly into heat energy

• By removing power sources

• By reducing the need for maintenance and lubrication

What do varying bicycle gear sizes connected by a chain allow riders to do?

• Fine tune pedaling speed and bicycle speed

• Increase weight of the bike

• Keep the chain from slipping off the gear teeth

• Maintain the same speed no matter how hard they pedal

What happens in lower gears on a bicycle?

• Faster pedaling but less distance per stroke

• Slower pedaling but more distance per stroke

• Chain skips without complete control

• Pedals stop moving completely to coast