You should submit the above questions, along with your answers and self-critiques. You may then begin work on the Questions, Problem and Exercises, as instructed below.
" "If the velocity of the object changes from 3 cm / sec to 13 cm / sec in 7 seconds, then at what average rate is the velocity changing?
13 cm-3 cm = 10 cm/ 7 seconds- 1.43 cm/second is the average rate in the velocity changing.
13 cm-3 cm = 10 cm.
10 cm is not the same as 10 cm/ 7 seconds
SO it's not true to say that 13 cm-3 cm = 10 cm/ 7 seconds.
10 cm and 13 cm are not quantities associated with this problem.
10 cm/s and 13 cm/s are.
1.43 cm/s is not an average rate of change of velocity with respect to clock time. It doesn't have the right units.
A ball rolling from rest down a constant incline requires 9.6 seconds to roll the 99 centimeter length of the incline.
• What is its average velocity? 99 cm/9.6 seconds= 10.3 cm/s
An object which accelerates uniformly from rest will attain a final velocity which is double its average velocity.
• What therefore is the final velocity of this ball? 10.3 cm/s*2= 20.6 cm/s
• What average rate is the velocity of the ball therefore changing? It is changing 10.3 cm/s.
What is the definition of ave rate of change of velocity with respect to clock time?
What quantities should you therefore be using to calculate this average rate?
An automobile accelerates uniformly down a constant incline, starting from rest. It requires 16 seconds to cover a distance of 120 meters. At what average rate is the velocity of the automobile therefore changing?
120 meters/16 seconds =7.5 m/s
This is ave rate of change of position with respect to clock time. Useful, but it isn't the answer to the question.
&#At least part of your solution does not agree with the solution and comments given at the link below. You should view the solution at that link and self-critique as indicated there.
Solution
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&#At least part of your solution does not agree with the solution and comments given at the link below. You should view the solution at that link and self-critique as indicated there.
Solution
&#If the link is broken please inform the instructor immediately to obtain the correct link.
#$&*