Physics (Unit 3 + 4)
Define Vector
A variable quantity, such as force, that has magnitude and direction
Define resultant vector
A single vector, that is a combination of 2 or more vectors (magnitude + direction)
Define Impact velocity
The velocity of a projectile immediately before striking the ground; the magnitude of impact velocity is impact speed
Define resolution
Determining components of a vector, usuallu at right angles to each other (horizontal and vertical components)
Define components
A depiction of the influence of a vector in a given direction
Define angle of elevation
The angle at which a projectile is launched, with respect to the horizontal plane.
How to find components of a vector
Horizontal = Ux = Ucos0
Verticao = Uy = Usin0
Define free-fall acceleration
The acceleration of a body falling freely in a vacuum near the surface of an astronomical body in the local gravitational field
Define range
The horizontal displacement of a projectile upon impact
When landing at same height as launch...
- Impct speed = Launch speed
- Horizontal component remains constant
- Vertical component: - launch velocity = impact velocity
When landing at a lower height than the launch...
- Vertical velocity is negative
- Vertical displacement is negative
When landing higher than the launch...
- Same as same height
Higher angle means
More time in the air