Projectile Motion Flashcards
What is projectile motion?
Objects in motion & affected by gravity
- called “trajectory” and represented by a parabolaaaright?? -J
Tell me what you know about multi-Image Diagram 0-0
Vertical & Horizontal components
waiiit i thought multi image diagram is the pic with balls n vectors??-J
- i thought they were moving objects at different points in time…and how we can like do momentum and all that..-Y
What are the things you have to remember about vertical & horizontal components?
- Vertical component: affected by m (gravity)
- Horizontal component: remain CONSTANT!
Components questions require right triangles sometimes, list out the rules to find sides of a triangle?
Sin0= O/H (Opposite side)
Cos0= A/H (ADJ)
Tan0= O/A (Hyp)
Small reminder!
Air resistance is ignored when calculating!! Thats why horizontal component is constant 0-0
How to explain an object’s components when its launched into the air?
- The horizontal component of… will always remain constant at…
- No external force acting on.. in the horizontal direction during…,
- Resulting in NO a-> & NO change in speed (Newton’s 1st law: Inertia)
- Vertical component of… will change
- Force due to gravity is always acting on…
- No other force to counteract gravity while…
- F=ma-> implies there’s vertical component of…, speed is always changing (9.8ms-2 vertically downward)
What is the best launched angle?
- ∠45*
Why ∠45* is the best launched angle?
It provides a maximum range (distance) for projectiles that land at the same height they were launched.
How does ∠45* relate to horizontal and vertical components?
- Vertical component of v increases = an increase in time of flight
(Thus, the object can last longer in the air, travelling larger)
What’s the role of AIR resistance?
It opposes the motion of the object through a medium, leading to a change in motion.
Is air resistance a force?
Yes
How is friction same and different from air resistance?
SAME: prevents objects from rolling/ moving
DIFFERENT: only apply for solid objects (on the ground)
the different part is for friction right?? ^^ - J
When does drag force occur?
When objects change motion due to any medium (E.g. AirResistance, Water, etc)
How does drag force work?
at in the opposite direction to object’s motion (affecting speed + direction)
What are the factors that influence the magnitude of drag force?
- Speed of object
- Cross-sectional area
- Density of the medium (E.g. air particles contact with the object)