Physical Science, Chapter 12, Force and Motion, Flashcard

Front

What is Bernoulli's principle?

Back

Bernoulli's principle states that as the speed of a fluid increases, the pressure within the fluid decreases. This principle explains why fast-moving water exerts less pressure than slow-moving water.

Front

What causes friction?

Back

Friction is the resistance that one surface or object encounters when moving over another. It is caused by the interactions between the surfaces in contact.

Front

How do planets demonstrate the presence of gravity in space?

Back

Planets orbit the sun due to the gravitational pull exerted by the sun, which is a demonstration of gravity's presence in space.

Front

What happens to objects in free fall in a vacuum?

Back

In a vacuum, where there is no air resistance, all objects fall at the same rate regardless of their mass.

Front

How can air resistance be minimized in a rocket design?

Back

To minimize air resistance, a rocket should have a decreased surface area, which reduces the amount of air it has to push against.

Front

Define force in the context of physics.

Back

Force is a push or pull acting upon an object, resulting from the object's interaction with another object.

Front

What is the formula for calculating force?

Back

Force (F) is calculated using the formula F = mass (m) × acceleration (a).

Front

What is Newton's first law of motion?

Back

Newton's first law states that an object at rest will remain at rest, and an object in motion will remain in motion at a constant velocity unless acted upon by a net external force.

Front

Explain the concept of inertia.

Back

Inertia is the tendency of an object to resist changes in its state of motion. The greater the mass of an object, the greater its inertia.

Front

What is the relationship between mass and weight?

Back

Weight is the force exerted by gravity on an object, calculated as weight (W) = mass (m) × gravitational acceleration (g).