Mechanical Physics Flashcards
What does velocity mean?
how fast something is moving or the rate of change of position over time
What does acceleration mean?
The rate of change in velocity overtime
If velocity is constant, then acceleration is ____
zero
Does there have to be a change in velocity? (Speed up or speed down)
Yes!
Making an x-ray:
Electrons are accelerated at a very high velocity towards a stationary object, which stops them from converting that energy of motion into electromagnetic energy. (Photons)
Newton’s first law of motion is:
Inertia
- A body will remain at rest or will continue to move with a constant velocity in a straight line unless, acted upon by an external force
- “An object in motion will remain in motion and an object at rest will remain at rest, unless acted upon by a force”
Can there be acceleration with no force?
No! If there is no force, there is no acceleration
Newton’s second law of motion:
Force!
- law states that force equals mass times acceleration
Newton’s third law of motion:
For every action, there is an equal but opposite reaction
Between x ray photos (scatter radiation), the angle of travel and the distance traveled relates back to what?
Newtons Third Law of Motion
An objects mass is ____
Constant
Potential energy ___ as Kinetic energy increases.
Give a example
Declines or vice versa
- a skier at the top of a hill
What must you have for X-Ray production?
Source of electrons
Acceleration
Deceleration
