Physics 8th: Pressure and Force

Name two types of contact forces.

• Friction, Tension

• Pressure, Buoyancy

• Inertia, Velocity

• Gravity, Magnetism

What are non-contact forces? Give an example.

• Electric force

• An example of a non-contact force is gravitational force.

• Frictional force

• Magnetic force

What is the formula for calculating pressure?

• Pressure = Area / Force

• Pressure = Force + Area

• Pressure = Force / Area

• Pressure = Mass / Volume

What unit is pressure measured in?

• Newtons per square meter (N/m²)

• Millimeters of mercury (mmHg)

• Atmospheres (atm)

• Pascals (Pa)

If a force of 10 N is applied over an area of 2 m², what is the pressure?

• 20 Pa

• 2 Pa

• 5 Pa

• 10 Pa

How does increasing the area affect pressure, assuming the force remains constant?

• Increasing the area decreases pressure, assuming force remains constant.

• Increasing the area causes pressure to fluctuate, assuming force remains constant.

• Increasing the area increases pressure, assuming force remains constant.

• Increasing the area has no effect on pressure, assuming force remains constant.

What happens to pressure if the density of a fluid increases?

• Pressure remains constant regardless of fluid density changes.

• Pressure increases if the density of a fluid increases.

• Pressure decreases if the density of a fluid increases.

• Pressure is unaffected by the density of a fluid.

What is the relationship between pressure and force?

• Pressure increases with decreasing force.

• Force is independent of area.

• Pressure is the same as force.

• Pressure is the force applied per unit area.

Define atmospheric pressure and its significance.

• Atmospheric pressure is the temperature of the air in the atmosphere.

• Atmospheric pressure is the amount of moisture in the air.

• Atmospheric pressure is the speed of wind at sea level.

• Atmospheric pressure is the force exerted by the weight of air above a point, significant for weather, boiling points, and respiration.

How does pressure change with depth in a fluid?

• Pressure remains constant regardless of depth in a fluid.

• Pressure increases with depth in a fluid.

• Pressure decreases with depth in a fluid.

• Pressure fluctuates randomly with depth in a fluid.