Acceleration And Velocity Quiz Flashcards
Scalar Quantity
- Distance and Speed
- A quantity with only magnitude or size
- Does not tell you direction of movement (5m, 75km)
Speed SI Unit
m/s
Displacement SI Unit
Meters (m)
Velocity
- Displacement over a given time interval
- Meters/seconds (m/s)
- Graph: distance (X)/time
Acceleration
- Change of velocity over a period of time
- Meters/ seconds^2
- (m/s^2)
- Graph: change Velocity/ change time
Average Speed Equation
Average speed= distance/ change in time
Vector Quantities
- Acceleration, displacement, velocity
- Has both magnitude and direction
When is average speed = average velocity
-When there is only one direction of travel
Acceleration graph
- Velocity/t
- Speeding up or slowing down
Velocity Graph
X/t (displacement over time)
-Changing direction (forward or backward)
What does the area under a velocity vs. time graph represent?
- displacement
- Triangle: 1/2 v*t
Free fall
-The motion of a body when only the force due to gravity is acting on the body
Weight Equation
W=m*g
M=mass
G= gravity
Gravity
- 9.8 m/s^2 (type of acceleration)
- Approximated because gravity is different depending on the objects elevation (closer to earth’s center= higher force of gravity, further away= lower force of gravity)
Objects thrown upward
1)If an object returns to its start elevation
t0=t
2)At maximum height
V=0 m/s (ball has to stop to change direction)
Acceleration= gravity= 9.8 m/s^s
3)Object returns to its starting point w/
V0=v, but end velocity is negative (opposite direction) & magnitude is equal
