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Practice Writing: Summarize Written Text
ID: #44479
Clutches
Instructions
Read the passage below and summarize it using one sentence. Type your response in the box at the bottom of the screen. You have 10 minutes to finish this task. Your response will be judged on the quality of your writing and on how well your response presents the key points in the passage.
Clutches are useful in devices that have two rotating shafts, including cars. One of the shafts is typically driven by a motor or pulley, and the other shaft drives another device. The clutch connects the two shafts so that they can either be locked together and spin at the same speed, or be decoupled and spin at different speeds.
In a car, you need a clutch because the engine spins all the time, but the car's wheels do not. In order for a car to stop without killing the engine, the wheels need to be disconnected from the engine somehow. The clutch allows us to smoothly engage a spinning engine with a transmission that is not spinning by controlling the slippage between them.
To understand how a clutch works, it helps to know a little bit about friction, which is a measure of how hard it is to slide one object over another. Friction is caused by the peaks and valleys that are part of every surface; even very smooth surfaces still have microscopic peaks and valleys. The larger these peaks and valleys are, the harder it is to slide the object.
A clutch works because of friction between a clutch plate and a flywheel. When your foot is off the clutch pedal in a manual car, springs push the pressure plate against the clutch disc, which in turn presses against the flywheel. This locks the engine to the transmission input shaft, causing them to spin at the same speed.
In a car, you need a clutch because the engine spins all the time, but the car's wheels do not. In order for a car to stop without killing the engine, the wheels need to be disconnected from the engine somehow. The clutch allows us to smoothly engage a spinning engine with a transmission that is not spinning by controlling the slippage between them.
To understand how a clutch works, it helps to know a little bit about friction, which is a measure of how hard it is to slide one object over another. Friction is caused by the peaks and valleys that are part of every surface; even very smooth surfaces still have microscopic peaks and valleys. The larger these peaks and valleys are, the harder it is to slide the object.
A clutch works because of friction between a clutch plate and a flywheel. When your foot is off the clutch pedal in a manual car, springs push the pressure plate against the clutch disc, which in turn presses against the flywheel. This locks the engine to the transmission input shaft, causing them to spin at the same speed.
* Summarize in the box below (between 5 and 75 words)
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Sample Answer
The clutch connects the two shafts so that they can either be locked together and spin at the same speed, or be decoupled and spin at various speeds, and the clutch allows us to smoothly engage a spinning engine to a transmission that is not spinning by controlling the slippage between them.
Explanation
The clutch connects the two shafts so that they can either be locked together and spin at the same speed, or be decoupled and spin at various speeds, and the clutch allows us to smoothly engage a spinning engine to a transmission that is not spinning by controlling the slippage between them.
Replaced "different" with "various"
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