Physics Team Trivia!
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Transcript of Physics Team Trivia!
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Physics Team Trivia!One-Dimensional Motion
Mr. Richter
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First Quarter Categories
Displacement Upward Launches Free Fall Negative Acceleration
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Displacement
A man walks 15 m to his left and then 10 m back to his right. What is his displacement?
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Displacement
-5 m
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Upward Launches
An object is launched upward at +5m/s. What is its velocity at the peak of its flight?
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Upward Launches
0 m/s
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Free Fall
What is the velocity of a dropped object after 3.00 seconds? (sig figs!)
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Free Fall
-29.4 m/s
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Negative Acceleration
Which of the following is NOT an example of negative acceleration?A. A car driving to the left and getting faster.B. A car driving to the right and slowing down.C. A car driving to the left and slowing down.D. A ball being thrown upward and return to where it came
from.
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Negative Acceleration
C. A car driving to the left has negative velocity, but if it is slowing down, its acceleration is positive.
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Picture Round
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Second Quarter Categories
Free Fall Calculating Acceleration Constant Velocity Upward Launches
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Free Fall
A bowling ball and a golf ball are dropped from a rooftop. Which, if either, has a greater acceleration?
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Free Fall
Neither. Each is subject to the same -9.81 m/s2.
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Calculating Acceleration
An car traveling 30 m/s to the right slows to 15 m/s in 3.0 seconds. Calculate the acceleration of the car.
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Calculating Acceleration
-5 m/s2
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Constant Velocity
What is the acceleration of an ice skater traveling in a straight line at a constant 4 m/s?
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Zero. Constant (unchanging) velocity means zero acceleration.
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Upward Launches
A rocket leaves the ground with an initial upward velocity of +15 m/s. What is its velocity just before it hits the ground again?
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Upward Launches
- 15 m/s
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Half Time!Review the rules.
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Calculate
When Mr. Richter drops a student’s cell phone out of a 3rd story window 14.6 m high. How long does it take the student’s phone to smash to pieces on the ground below?
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Half Time: Calculate
1.73 seconds
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Third Quarter Categories
Free Fall Upward Launches Average Velocity PvT Graphs
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Free Fall
A feather and an apple will only fall at the same rate under what condition?
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Free Fall
No air resistance. In a vacuum.
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Upward Launches
Which, if either, has a greater acceleration: A ball thrown upward at +4 m/s or a ball thrown downward at -3 m/s?
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Upward Launches
Neither. All bodies in free fall are subject to the same acceleration.
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Average Velocity
Mr. Richter drives 5 km to school at 50 km/h, then drives to a store 2 km away on the way back at 70 km/h, and finally returns home 3 km away at 40 km/h. What is his average velocity over the course of this trip?
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Average Velocity
Zero. No displacement, no velocity.
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PvT Graphs
Sketch the PvT graph of an object starting from rest, traveling in the positive direction and experiencing constant positive acceleration.
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PvT Graphs
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Third Quarter Bonus
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Third Quarter Bonus: Vocab
Write the terms that are defined by the following definitions:
1. the change in position
2. the rate of change of velocity
3. the rate of change of position
4. the motion of an object falling to the Earth
5. the amount that an object’s velocity changes every second
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Third Quarter Bonus: Vocab
1. Displacement
2. Acceleration
3. Velocity
4. Free fall acceleration or acceleration due to gravity
5. Acceleration
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Fourth Quarter Categories
Oil Drop Diagrams Upward Launches Acceleration Calculation PvT Graphs
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Oil Drop Diagram
Draw the oil drop diagram of a ball thrown upward and reaching its peak height.
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Oil Drop Diagram
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Upward Launches
An object is launched from the ground and takes 12.2 seconds to return. At what time does the object reach its maximum height?
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Upward Launches
6.1 seconds
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Acceleration Calculation
A cyclist pedaling at 3.5 m/s accelerates at a rate of 1.2 m/s2 for 4.5 seconds. What velocity does the cyclist reach?
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Acceleration Calculation
8.9 m/s
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PvT Graphs
Sketch the Position vs. Time Graph of an object moving backward with zero acceleration.
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PvT Graphs
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Final Round
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Calculation
A parachutist descending at a speed of 10.0 m/s loses a shoe at an altitude of 50.0 m. When does the shoe reach the ground? What is the velocity of the shoe just before it hits the
ground?
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Final Round
2.33 seconds -32.9 m/s