Module 4A

Question 1

Freely Falling objects

Answer 1

Objects falling under the influence of the force of gravity only

Question 2

Acceleration

Answer 2

The time of the rate of change of an object’s velocity

Question 3

If acceleration is a constant…

Answer 3

…it’s direction must not change, and it’s speed must change linearly

Question 4

Newton’s 2nd Law of Motion

Answer 4

When a net external force acts on an object, it accelerates and it’s velocity changes

Question 5

Newton’s Law of Gravity

Answer 5

There exists a universally attractive force between any two masses

Question 6

Law of action & reaction

Answer 6

Newton’s 3rd Law of Motion

Question 7

Law of Motion

Answer 7

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

An Action/reaction, is a force impressed upon some object.

Question 8

Visible Planets

Answer 8

All the planets that can be seen without telescope

Question 9

Mercury, venus, mars, jupiter, saturn

Answer 9

Visible Planets

Question 10

The Ecliptic Plane

Answer 10

The plane of Earth’s orbit around the sun

Question 11

Kepler: 1st Law of Planetary Motion

Answer 11

The orbit of a planet is an ellipse

Question 12

Kepler: 2nd Law of Planetary Motion

Answer 12

Line segment joining a planet & the sun, sweeps out equal areas during equal intervals of time

Question 13

Kepler: 3rd Law of Planetary Motion

Answer 13

The square of the orbital period of a planet is directly proportional to the cube of the semi-major axis of it’s orbit.

Question 14

Albedo

Answer 14

High reflectivity

Question 15

1/4 of a lb of weight

Answer 15

A newton of force