Physics Flashcard 5

Front

What is a force?

Back

A force is a push or pull acting upon an object, which can cause it to accelerate, decelerate, or change direction.

Front

What is friction?

Back

Friction is a force that opposes the motion of an object when it is in contact with another surface.

Front

How does temperature relate to molecular motion?

Back

Temperature describes the average kinetic energy of the molecules in an object, indicating how fast they are moving.

Front

What is the formula to calculate weight?

Back

Weight (W) = mass (m) × gravitational acceleration (g), where g is approximately 9.8 m/s² on Earth.

Front

What is the coefficient of friction?

Back

The coefficient of friction (μ) is a numerical value that represents the frictional force between two surfaces in contact.

Front

How do you calculate the strength of friction?

Back

Strength of friction = normal force (weight) × coefficient of friction (μ).

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion, calculated as KE = 1/2 mv².

Front

What is potential energy?

Back

Potential energy is the stored energy of an object due to its position or state, commonly gravitational potential energy.

Front

What is Newton's first law of motion?

Back

An object at rest stays at rest, and an object in motion stays in motion at a constant velocity unless acted upon by a net external force.