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Questions and Answers
Net force is NOT equal to zero if a
Net force is NOT equal to zero if a
- ball is falling freely from a height.
- helicopter is hovering above the ground. (correct)
- cork is floating on the surface of water.
- kite is held stationary in the sky.
The magnitude of non-contact force depends on the
The magnitude of non-contact force depends on the
- all of these
- distance
- chemical composition
- mass (correct)
We drink juice from a glass through a straw due to the
We drink juice from a glass through a straw due to the
- atmospheric pressure. (correct)
- gravitational pull.
- all of these
- volume of liquid.
A deep sea diver's ears get hurt when inside water due to
A deep sea diver's ears get hurt when inside water due to
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What does a barometer measure?
What does a barometer measure?
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Why does a rubber sucker stick to any surface when pressed?
Why does a rubber sucker stick to any surface when pressed?
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Which action requires a pushing force?
Which action requires a pushing force?
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Deep sea divers wear a special suit to
Deep sea divers wear a special suit to
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Study Notes
Forces & Pressure
- Net Force: If a helicopter hovers above the ground, the net force is not zero.
- Non-Contact Forces: The magnitude of non-contact forces depends on the mass between two bodies.
- Atmospheric Pressure: We drink juice from a glass using a straw because of atmospheric pressure.
- Pressure & Depth: A deep-sea diver's ears get hurt underwater due to increased water pressure.
- Barometer: A barometer measures atmospheric pressure.
- Rubber Sucker: A rubber sucker sticks to surfaces due to its inherent properties.
- Pushing Force: Throwing a stone requires a pushing force.
- Low Pressure Application: Wide tires on heavy vehicles are an application of low pressure.
- Force Not Required: A balloon bursting doesn't require a force to occur.
- Deep-Sea Diving Suits: Deep-sea divers wear special suits to counter the pressure in the sea.
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