Flashcard: Newton's Laws & Gravity 2024

Front

What is Newton's 1st 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.

Front

Define inertia.

Back

Inertia is the tendency of an object to resist changes in its state of motion.

Front

What is the force of gravity?

Back

Gravity is a force that attracts two bodies toward each other, proportional to their masses and inversely proportional to the square of the distance between their centers.

Front

What is the formula for calculating weight?

Back

Weight (W) = mass (m) × acceleration due to gravity (g).

Front

What is the acceleration due to gravity on Earth?

Back

Approximately 9.8 m/sec².

Front

What is Newton's 2nd Law of Motion?

Back

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F = ma).

Front

What is the relationship between force, mass, and acceleration?

Back

Force equals mass times acceleration (F = ma).

Front

What is Newton's 3rd Law of Motion?

Back

For every action, there is an equal and opposite reaction.

Front

How does gravity affect the motion of planets?

Back

Gravity keeps planets in orbit around the Sun by pulling them toward it, balancing their inertia.

Front

What is the mass of an object if a force of 24 N causes an acceleration of 4 m/sec²?

Back

Mass = Force / Acceleration = 24 N / 4 m/sec² = 6 kg.