Dynamixs Flashcards
What is the study of dynamics?
The study of how things move (focuses on forces that cause objects to change their state of motion) ex: speed⬆️, slow⬇️ or change direction
Force:
Cause he push or pull action (causes objects to change their state of motion) has size and magnitude (vector quantity)
What r the 4 fundamental forces:
- Gravity 2. Weak nuclear 3. Electromagnetic 4. Strong nuclear
Gravity::
(Very weak) attractive only!
Weak nuclear:
(10^25 x stronger than gravity) inside the nucleus and attractive or repulsive!
Electromagnetic:
(10^36 x stronger than gravity) electric charges, magnetism, light. Attractive or repulsive!
Strong nuclear:
(10^38 x stronger than gravity). Holds the nucleus of an atom together. Attractive or repulsive !
Newtons 1st law:
A measure of an objects resistance to change of motion.
What do objects at rest tend to do?
Stay at rest
What do objects in motion tend to do?
Stay in motion
When is an objects motion only changed?
When an external force acts on it.
What does mass have to do with inertia?
Mass is a measure of inertia.
What happens to the inertia of the mass increase or decreases?
Mass ⬆️, inertia ⬆️ (more resistance to change in motion)
Balanced forces have a v & a of?:
V= 0m/s a= 0m/s/s
Examples of first law
Hockey puck sliding, throwing ball, car crash
Newtons 2nd law:
Mathematical + universal relationship between unbalanced force applied to object (mass and resulting a. if the object)
Proportional relationship occurs when:
Masses r the equal and forces are different
Inversely proportional occurs ?
When masses are different and forces the same
If F goes up, a ?
A goes up
If F goes down , a?
Goes down
If m goes up, a ?
Goes down
If m goes down, a ?
Goes up
If m is up, a is constant, F ?
Goes up
If m is down, a is constant, F?
Goes down
