Your 'cq_1_17.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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A steel ball rolls down a ramp and collides with a marble, as in the video. The marble is slightly smaller and quite a bit less massive than the ball.
If they both experience the same force, which will have the greater acceleration?
answer/question/discussion: The smaller less massive marble will experience the greater acceleration. Force is a product of mass * acceleration. So if the force is the same for both, but the mass is less then the acceleration will need to be higher. For example. The steel ball has a mass 10 and an accleration 2 then the force will be twenty. If the force is still 20 for the marble, but it only has a mass of 5 then the acceleration will have to be 4. (yes, I know 10kg and 5 kg are a little heavy for these objects, but they are easy numbers to work with)
If the forces were exerted during identical time intervals, which would have the greater change in velocity?
answer/question/discussion:
The smaller, less dense marble will have a greater change in velocity. First it stands to reason that if it’s acceleration is greater then it will have a greater change in velocity, but we can do it mathematically also.
Fnet * dt = m* dv
Using the same numbers as in my previous example and saying 5 seconds
20N * 5s = 10kg*dv
Dv = 10 m/s
20N * 5s = 5kg * dv
Dv = 20 m/s
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10 mins
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Seed question 17.1 and 17.2 appear to be exactly the same.
&#Very good responses. Let me know if you have questions. &#