PRESSURE
1. Explain carefully why a person will make holes in a
wooden floor when wearing spiked running shoes but not when wearing flat shoes.
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2. A crate of drinks weighs 2000 Newtons. If the area
of its base is 0.5
square metres what is its pressure on the ground?
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3. A boiler contains steam at a pressure of 200 000
Newtons per square metre. If the area of one end is 1.5 square metres, what is
the force on this end?
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4. If all the air is pumped out of a can describe and
explain what happens to the can.
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5. If you dive to
the bottom of a swimming pool what happens to the pressure on our ears?
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6. Explain what difference you would have noticed in
the pressure if the pool had been filled with mercury instead of water.
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7. A weather balloon, partly filled with helium gas is
released from the ground and rises through the air. Describe and explain what
happens to the balloon as it gains height.
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