Exploring Force and Pressure

What is the definition of force?

• Force is an interaction that causes an object to change its velocity.

• Force is the distance an object travels over time.

• Force is a type of energy that can be stored.

• Force is the mass of an object multiplied by its acceleration.

Name the two main types of forces.

• Frictional forces and gravitational forces

• Balanced forces and unbalanced forces

• Contact forces and non-contact forces

• Magnetic forces and electrical forces

What is gravitational force?

• Gravitational force is the attraction between two masses.

• Gravitational force is the force that keeps objects in a straight line.

• Gravitational force only acts on objects in motion.

• Gravitational force is a repulsive force between two masses.

What is the difference between contact and non-contact forces?

• Contact forces involve direct interaction; non-contact forces act at a distance.

• Contact forces can only be felt through touch; non-contact forces cannot be felt at all.

• Contact forces are always stronger than non-contact forces; non-contact forces are weak.

• Contact forces are only found in liquids; non-contact forces are only found in solids.

Define pressure in the context of fluids.

• Pressure is the temperature of a fluid at rest.

• Pressure is the volume of a fluid divided by its mass.

• Pressure is the force per unit area exerted by a fluid.

• Pressure is the weight of a fluid in motion.

How is pressure calculated in a fluid?

• P = F/A or P = P0 + ρgh

• P = mv^2

• P = 2πr

• P = mgh

What unit is pressure measured in?

• Atmospheres (atm)

• Millimeters of mercury (mmHg)

• Pascals (Pa)

• Newtons per square meter (N/m²)

Explain how pressure changes with depth in a fluid.

• Pressure decreases with depth in a fluid.

• Pressure fluctuates randomly with depth in a fluid.

• Pressure increases with depth in a fluid.

• Pressure remains constant regardless of depth in a fluid.

What are the effects of pressure on a submerged object?

• Increased pressure can cause deformation, affect buoyancy, and change volume.

• Pressure only affects the surface of the object.

• Increased pressure always increases buoyancy.

• Pressure has no effect on submerged objects.

How does atmospheric pressure affect us?

• Atmospheric pressure is irrelevant to breathing.

• Atmospheric pressure affects our breathing, health, and daily activities.

• It has no impact on human health or activities.

• Atmospheric pressure only affects weather patterns.