Grade 12 PhysicsU

Lesson5 Exercises

New Textbook:

  • Read p17 to 18 and go over the lesson 5 summary notes
  • Using GUFSA, see if you can solve sample problem #1 p18 and sample problem #2 p19, then check your solution with the textbook solution
  • Use GUFSA and problem solving strategies learned in class to try p16 Q5 to Q7, then Check answers page 714
  • Use GUFSA and problem solving strategies learned in class to try p19 Q1 to Q6, then Check answers same page
  • Read the top of p 20. Use GUFSA and problem solving strategies learned in class to try the sample problem #1 on p20, then check your solution with the textbook solution.
  • Use GUFSA and problem solving strategies learned in class to try p20 Q1 to Q5, then Check answers same page
  • Use GUFSA and problem solving strategies learned in class to try p21 Q1 to 3, Q5 to Q7, then Check answers page 714

Old Textbook:

  • Use GUFSA and problem solving strategies learned in class to try p20 Q5 to Q7 then check answers same page
  • Read p24 to p25
  • Use GUFSA and problem solving strategies learned in class to re-do sample problem #5 and #6, then check your solution with the textbook solution
  • Use GUFSA and problem solving strategies learned in class to try P27 Q19 to Q22 then check answers same page
  • Read p 32, p 33, p 35
  • Use GUFSA and problem solving strategies learned in class to redo sample problems #1 and #2 p36-37, then check your solution with the textbook solution
  • Use GUFSA and problem solving strategies learned in class to try p37-38 Q11, Q12, and Q14, Q15, Q16 then check answers same page
  • Use GUFSA and problem solving strategies learned in class to try p40 Q3-8, Q10 then check answers page 781

Critical Thinking Questions:

  1. A worker on the top of a metal tower on an unknown planet drops a hammer from rest. The hammer accelerates on this planet with a constant value of 6.00 m/s/s [down]. The hammer hits the bottom of the tower and soon after impact the worker hears two distinct sounds. The first sound is heard 7.5 seconds after the drop when the sound travels at a constant speed from the tower base vertically back up through the metal to worker's ear. The second sound is carried by the alien “air” of the planet and is heard 1.50 seconds after the first sound. If the constant speed of sound in this planet's air is 80.0 m/s, calculate the speed of sound in the metal. Check answer approx 385 m/s
  2. Myron Ballooney is supported by a stationary hot air balloon directly above “Sam Sure Shot” lying on the ground below. Sam fires a pistol at the balloon. The time between pistol firing and balloon bursting is the same as the time between balloon bursting and Sam hearing the bursting of the balloon. The initial speed of the bullet directly upward was precisely 1.00% greater than the speed of sound in air. ( 344 m/s ) Assuming Sam fires the bullet from ground level, no air resistance, and an acceleration due to gravity of 9.80 m/s/s [down] , how high was the balloon when it burst? Check answer 242 m
  3. Dick and Jane ran a 100.0 m race. Jane won, crossing the finish line 5.00 m ahead of Dick. Jane was a good sport, and agreed to start a second race 5.00 m behind the start line, so she would have to run 105.0 m while Dick ran 100.0 m. Assuming they each ran at their own constant speed during both races, who won the second race or was it a tie? Check answer Jane won again