#$&*
Phy 231
Your 'cq_1_17.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** **
A steel ball rolls down a ramp and collides with a marble, as in the video. The marble is slightly smaller and quite a bit less massive than the ball.
• If they both experience the same force, which will have the greater acceleration?
answer/question/discussion: ->->->->->->->->->->->-> :
The marble will have the greater acceleration because the smaller the object and the less dense the object, the greater the acceleration of the object. Also, F = m*a, therefore a = F/m. Since the force is the same for both objects, the larger the mass of an object, the lower the acceleration. Therefore the object with the least mass will have the greater acceleration. Therefore the marble will have a greater acceleration.
#$&*
• If the forces were exerted during identical time intervals, which would have the greater change in velocity?
answer/question/discussion: ->->->->->->->->->->->-> :
a = change in velocity / `dt; F = m*a ; a= F/m
F/m = change in velocity / `dt
Change in velocity = (F*`dt) / m. Since the force and the time intervals are identical for both objects, and since mass is the denominator, the greater the mass the lower the change in velocity and the lower the mass, the greater the change in velocity. The marble has the lower mass, therefore the marble would have the greater change in velocity.
#$&*
** **
About 10 minutes
** **
&#Very good responses. Let me know if you have questions. &#