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Physics Pressure and Force Quiz

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Questions and Answers

What force makes a rolling ball stop on its own?

Friction force

What force might be responsible for the attraction between a rubbed balloon and a wall?

Electrostatic force

What is the name given to the force acting on a unit area of an object?

Pressure

What conclusion can be drawn from the observation of a fountain of water from a leaking joint in pipes?

Water exerts force on the bottom of the container. Signup and view all the answers

What is the formula to calculate force when given pressure and area?

Force = pressure × area Signup and view all the answers

What is the standard unit to measure atmospheric pressure?

mm of mercury Signup and view all the answers

How do you calculate the area of a surface when given pressure and force?

Area = Pressure / Thrust Signup and view all the answers

What conclusion can be drawn from observing water rushing out faster from a bottom hole in a bucket filled with water?

Pressure exerted by water increases with increasing depth Signup and view all the answers

Explain how a wider strap on a backpack can help distribute the force more effectively. Use a physics equation to support your explanation.

A wider strap distributes the force throughout a greater surface area, reducing pressure. This can be calculated using the equation Pressure = Force/Area. Signup and view all the answers

Define atmospheric pressure and explain its origin.

Atmospheric pressure is the force exerted by the weight of the air in the atmosphere on a surface. It originates from the weight of the air pushing down due to gravity. Signup and view all the answers

How does the human body withstand the pressure exerted by the atmosphere, preventing it from being crushed?

The human body withstands atmospheric pressure as it is also pressurized internally. When diving to depths, gases in the body compress to balance the external pressure. Signup and view all the answers

Discuss why atmospheric pressure decreases as altitude increases above the Earth's surface.

Atmospheric pressure decreases with altitude due to lower air density at higher altitudes. Gravity compresses air molecules more at lower altitudes, resulting in higher pressure. Signup and view all the answers