Lever and Pullies
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Lever and Pullies
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Senna often helps her grandfather in his vehicle recycling company in the Netherlands. If she needs to remove the wheels of a car, she uses a jack. A jack is very handy because it is a lever. With levers you don't need much strength to lift heavy objects. Senna starts to investigate the power of levers and pulleys among the old cars of her grandfather. She builds a secret drawer that can only be opened using a lever, she cracks a walnut with a door and she tries to lift a car using only muscle power and a few pulleys.
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