Gravity, Projectiles, and Satellites

These flashcards encompass key topics related to Gravity, Projectiles, and Satellites based on the lecture notes.

What is the Universal Law of Gravity?

Every body in the universe attracts every other body with a mutually attracting force.

What does the Inverse-Square Law state regarding gravity and distance?

The gravitational force is inversely proportional to the square of the distance between two masses.

What happens to an object's weight in free fall?

It experiences weightlessness because there is no support force acting on it.

How does the force of gravity vary with distance between two bodies?

The gravitational force decreases as the distance increases, following the inverse square law.

What is the escape speed required to leave Earth's gravitational field?

11.2 kilometers per second from Earth's surface.

What is a satellite in the context of projectile motion?

A projectile moving fast enough to fall continually around the Earth.

What happens to the weight of an object when an elevator accelerates upward?

Your weight reading on a scale is greater.

What is projectile motion?

The motion of an object through the air under the influence of gravity, consisting of horizontal and vertical components.

What is the relationship between launching angles and projectile range?

Two angles that add up to 90° will result in the same range for a projectile.

What does the phrase 'weightlessness' mean in an astronaut's experience?

It is a condition where a support force is lacking, causing the sensation of zero weight.