Questions | 5 |
Topics | Acceleration, Base Units, Momentum, Outer Planets, Stratus Clouds |
Newton's second law of motion leads to the formula for acceleration which is a measure of the rate of change of velocity per unit time and, if you solve for positive acceleration, reveals how much net force is needed to overcome an object's mass. The formula for acceleration is \(\vec{a} = { \vec{F} \over m }\) or, solving for force, \(\vec{F} = m\vec{a}\).
Measurement | Base Unit | Example |
---|---|---|
length / distance | meter (m) | km |
mass | gram (g) | kg |
volume | liter (L) | mL |
volume (medical) | cubic centimeter (cc) | cc |
time | second (s), minute (min), hour (h) | ms, min, h |
temperature | centigrade (°C) | °C |
Momentum is a measure of how difficult it is for a moving object to stop and is calculated by multiplying the object's mass by its velocity: \(\vec{p} = m\vec{v}\). Like velocity, momentum is a vector quantity as it expresses force applied in a specific direction.
In contrast to the solid terrestrial planets, the outer planets (Jupiter, Saturn, Uranus, and Neptune) consist of hydrogen and helium gas and water.
Clouds are categorized based on their shape, size, and altitude. Stratus clouds are low-altitude clouds characterized by horizontal layering with a broad flat base. When stratus clouds occur on the ground the result is fog.