Hello everyone,
My students are enjoying using VPython and are learning quickly. My first
assignment is to have students modify the bounce.py program in a variety of
ways.
I'd like for them to add a coefficient of restitution to more closely simulate
the bouncing of a real ball. My thinking is to modify the ball/floor impact
detection statement to read:
if (ball.pos.y <= ball.radius):
ball.velocity.y = -c*ball.velocity.y
where "c" is the coefficient of restitution.
Using a drop height of 20, an initial velocity of 0, and c = 0.85, the ball
only bounces once and then sticks to the floor :(
Changing only the drop height to 10, the ball now bounces 7 times before
sticking to the floor. :|
Shouldn't the ball bounce forever (just to a smaller height on each successive
bounce)? And why does changing the drop height matter? What's going on?
Thanks,
Frank Noschese
John Jay High School
Cross River, NY
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