Distance and Displacement
This measurement includes direction and tells an object's change in position.
Displacement
What's the difference between speed and velocity?
Velocity = speed + direction!
What units do we typically use IN SCIENCE 9 to measure acceleration?
meters per second squared (m/s^2)
Momentum depends on these two quantities/things...
Mass and velocity
What discipline of science are we currently learning? (Ex. Biology, Chemistry, etc.)
Physics
True or False: Distance always includes direction.
False
This quantity tells how fast an object is moving..
Speed!
What's the formula to calculate acceleration?
Change in velocity / time
Final velocity - initial velocity / time
True or False: A stationary object has momentum. And why?
False
No velocity!
What is tomorrow's spirit day?
Costume Day
What units do we typically use IN SCIENCE 9 to measure distance? (2)
meters or kilometers
What units do we typically use IN SCIENCE 9 to measure speed? (2)
meters per second (m/s) or kilometers per hour (km/h)
A car increases its speed from 5 m/s to 15 m/s. Did it accelerate or decelerate?
Accelerate
What units do we typically use IN SCIENCE 9 to measure momentum?
kg * m/s
Name 3 labs we have done... (100 points each)
Paper airplane, Hot Wheels, Zombie, Bubble Gum, Density Simulation, Senses..
A skateboarder starts at 0 m, travels to 15 m, then returns to 5 m.
Find the distance and displacement.
Distance: 20 m
Displacement: 5 m
A runner travels 200 meters at a speed of 10 m/s. How long did the run take?
t = d/s
t= 200/10
=20 seconds
Can an object moving at a constant speed in a circle be accelerating?
Yes, because its direction is changing.
A 2,000 kg truck travels at 20 m/s.
2000×20=40,000
40,000 kg·m/s
What is our next unit?
Forces
A soccer player runs:
Find the distance traveled and displacement.
Distance = 30+20+10
Distance = 60 m
Displacement = 30-20+10
Displacement = 20 m east
A runner travels 400 m in 50 s. A cyclist travels 800 m in 80 s. Who has the greater speed?
Runner: 400÷50=8 m/s
Cyclist: 800÷80=10 m/s
The cyclist
A car slows from 25 m/s to 15 m/s in 5 s.
Final velocity - initial velocity / time
(15 m/s - 25 m/s) / 5 s
= -10 m/s / 5 s
= -2 m/s
A 1,500 kg car has a momentum of 30,000 kg·m/s. What is the car's velocity?
v = p/m
v = 30,000/1,500
v = 20 m/s
What is Miss Schraeder and Mr. Sturgeon's subjects we each "specialized" in? (250 points each)
And, what college did each of us go to (+100 extra points)
Miss Schraeder: Biology
Mr. Sturgeon: Social Studies
Penn State!