Unit 4 Flashcards
(15 cards)
Ball on the ground lab:
IV:
DV:
CV:
Equation / Graph:
IV: distance (m)
DV: time (s)
CV: BB size large, ramp height high, tile floor
Equation / Graph: linear (d=vt)
Cart on a ramp lab:
IV:
DV:
CV:
Graph / equation:
IV: distance (cm)
DV: time (s)
CV: ramp height, cart mass, release from rest
Graph / equation: quadratic, acceleration, (d=vt^2)
When a ball is rolling down a ramp, what can we say about its velocity and acceleration?
It has increasing velocity and constant acceleration.
Change in velocity is the same thing as acceleration (t or f)
False
A car is accelerating at 5 m/m/s. What does this mean?
It is gaining 5 m/s of velocity and each second that it is in motion
Time and distance is always ______ when _______
Positive, slowing down
What is acceleration?
-How fast an object can change velocity
-Speeding up, slowing down, changing direction
-Change in velocity each second
What are the units for acceleration?
m/s/s
m/s^2
d=vt is the equation used for…
ONLY for constant speed
d=1/2 at^2 is the equation used for…
ONLY for accelerating from REST
When an object is moving at constant speed:
-motion
-equation
-graph
-c value
-ball on the ground (covers the same distance each second)
-d=vt
-linear
-velocity
When an object is speeding up from rest:
-motion
-equation
-graph
-c value
-cart on a ramp (covers more distance each second)
-d=1/2 at^2
-quadratic
-1/2 of the acceleration
How could we get acceleration from a graph?
-slope of velocity-time graph
-c value of quadratic is 1/2 of acceleration
How does the velocity-time graph relate to acceleration?
Slope of the velocity-time graph is accelearation
When do we use the long equation?
When the object is not starting from rest.
