Name: ______________________________ Pd: ________ Due Date: Wed, Feb. 26th LINEAR MOTION HOMEWORK
PART 0: READING!
Go to the “Readings” section of our class website:
https://sites.google.com/a/bridgeportps.net/engphysics/readings
Then, find the corresponding reading to this week’s homework. For this week, it is LinearMotionReading.pdf. Download the file, read all 6 pages, then answer the following questions!
1. Define all of the 6 “yellow highlighted words” in the box below!
2. Answer the 2 “Concept Check” Questions in the box below!
PART I: Speed & Velocity
Go to the “Video” section of our class website:
https://sites.google.com/a/bridgeportps.net/engphysics/video
1. Watch ALL of the following video: ESPN Sport’s Figures “Tracking Speed”
In 3 sentences or more, explain something you learned from the video in the box below.
2. Watch ALL of Khan Academy “Calculating Average Velocity or Speed” FAIRCHILD WHEELER MAGNET
What is Shantanu’s average velocity in meters/hour?
3. Watch ALL of Khan Academy “Solving for Time”
How long does it take Ben to run in seconds?
4. Watch ALL of Khan Academy “Displacement from Velocity and Time Example”
How far (in meters) and in what direction does Marcia travel?
SOLVE THE FOLLOWING PROBLEMS, SHOWING YOUR WORK (or NO CREDIT).
5. In the 2013 World Championships in Moscow, Russia, Usain Bolt broke the world record by running 100 meters in 9.58 seconds. What was Usain Bolt’s average speed in this race in meters/second?
6. The fastest trains in the world, MagLev trains, are magnetically levitated above the rails to avoid friction. These trains travel about 155 miles in 30 minutes (0.5 hour). What is the average speed of the train in miles/minute AND miles/hour?
8. Your friend, Labonida, lives 300 meters away from you. You end up
running to her house at an average speed of 5 m/s to hang out with her.
How many seconds does it take for you to get to her house? How many
minutes does it take for you to get to her house?
9. Your puppy scurries across the floor of your house, moving at a quick speed of 6 m/s! The puppy goes from one end of the room to the other end of the room in 3 seconds! What distance does the puppy cover (in meters)?
PART II: Acceleration
Watch ALL of Khan Academy “Acceleration” video, posted on the class website video tab.
1. What is the acceleration of the Porsche in miles/second2?
2. An object is accelerating if it is moving _________________. (Circle all that apply)
a) With changing speed b) With constant speed c) Extremely fast
d) With changing direction e) With constant direction
3. If an object is NOT accelerating, then one knows for sure that it is _________________.
a) At Rest
4. Mr A.’s (imaginary) Porsche accelerates from 0 to 60 mi/hr in 4 seconds. It’s acceleration is...
a) 60 mi/hr b) 15 m/s2
c) 15 mi/hr/s d) -15 mi/hr/s
5. A car speeds up from rest to +16 m/s in 4 seconds. Calculate the acceleration in m/s2.
6. A car slows down +32 m/s to +8 m/s in 4 seconds. Calculate the acceleration.
7. Ima Speedin puts the pedal to the metal and increases her speed as
follows: 0 mi/hr at 0 seconds; 10 mi/hr at 1 second; 20 mi/hr at 2 seconds; 30 mi/hr at 3 seconds; and 40 mi/hr at 4 seconds. What is the acceleration of Ima’s car?
PART 3: Graphing Motion
Go to the “Video” section of our class website:
https://sites.google.com/a/bridgeportps.net/engphysics/video
1. Watch ALL of the following video: Bozeman Science “Position vs. Time Graph – Part I”
2. Watch ALL of the following video: Bozeman Science “Position vs. Time Graph – Part 2”
3. Consider Mr. A’s data to the right for the first 10 minutes of his trip along I-95 to school. Determine the average speed (in miles/min) for his trip.
SHOW WORK HERE:
SHOW WORK HERE:
SHOW WORK HERE:
4. What is the speed of Mr. A’s car (in miles/minute) Between minutes 5 and 6 in his trip?
ANSWER THE FOLLOWING QUESTIONS BASED ON THE GRAPH BELOW The graph below shows Donovan Bailey’s split times for his 100-m record breaking run in the Atlanta Olympics in 1996.
5. At what point did he experience his greatest average speed for a 10 meter interval? Circle this spot on the graph. HINT: look at the slope of the line!
6. Calculate his speed during this interval in meters/second.
7. What was his average speed (in meters/second) for the overall race?
A: Moving Slow
B: Moving Fast A: Moving In
Positive Direction B: Moving In Negative Direction
A: Staying in The Same Spot B: Moving at Constant Speed
C: Accelerating A: Staying in Positive Direction with constant velocityB: Moving in Positive Direction and speeding up C: Moving in Negative Direction with constant velocity
D: Moving in Negative Direction and slowing down How much time did this homework take to complete in total?
How much did this homework help your understanding of the material?
1 (none) 2 3 4 5 (a LOT)
