2. Motion Along A Straight Line & Projectile Motion Flashcards
a scalar quantity that refers to
“how much ground an object has
covered” during its motion
* Unit: meter (m)
Distance
a vector quantity that refers to “how far out of place the object is”
* Unit: meter (m)
Displacement
a scalar quantity which tels us
how fast a body is moving.
* defined as the rate of change
of distance with respect to time.
* Unit: meter per second (m/s)
Speed
a vector quantity which tells us how
fast a body is moving and in what
direction.
* Unit: meter per second (m/s)
Velocity
displacement over time, direction
How fast an object moves from point x1 to x2 within a time interval t1 to t2.
Average velocity
occurs when an object moves equal displacements in each successive equal unit in time (illustrate)
Motion with constant velocity
DISPLACEMENT VS VELOCITY VS ACCELERATION
- Displacement
- change in position - Velocity
– how fast or how slow something is moving
– how fast or how slow the displacement changes - Acceleration
– how fast or how slow the velocity changes
– change in magnitude of velocity or a change in direction
is the limit of the average acceleration as the time interval approaches zero.
Instantaneous acceleration
The velocity at the highest point is
ALWAYS
zero
refers to the motion of an object that is thrown, or projected into the
air at an angle.
Projectile motion
the path followed by a projectile
Trajectory
Projectile motion:
1. its motion follows a ____
- Range R –
- ___is always tangent to the path.
parabolic path
maximum horizontal distance covered.
v
vy continuously decreases until it
becomes ___ when the object
reaches the highest point of its path.
zero
In projectile motion, the path followed by the object is called a ____, which is typically a parabolic curve.
trajectory (curved path)
Describes the way objects move- their velocity and acceleration.
Dynamics
