- #1
Mac13
- 14
- 0
hoop and disk rolling(help please)
ok I've been looking at this forever and can't get it...dont know what to do..i would appreciate it if someone could help
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A uniform solid disk and a uniform hoop are
placed side by side at the top of an incline of
height h.
If they are released from rest and roll with-
out slipping, determine their speeds when
they reach the bottom. (here i found the speeds to be
velocity disk = sqrt(4/3hg)
velocity hoop = sqrt(hg)
now here is my problem
What is the ratio of their accelerations as they
roll down the incline, a_disk / a_hoop?
1. 4/3
2. 2
3. sqrt(3)
4. sqrt(3/2)
5. 1/2 xxxx
6. sqrt(4/3)
7. 1/3 xxxx
8. 3
9. 3/2
10. sqrt(2)
..ps - the ones i put an xxxx out the right on i figured couldn't be it since the velocity of the disk is greater the acceleration of the disk(top value) must be greater
ok I've been looking at this forever and can't get it...dont know what to do..i would appreciate it if someone could help
--------------------------------------------------------------------------
A uniform solid disk and a uniform hoop are
placed side by side at the top of an incline of
height h.
If they are released from rest and roll with-
out slipping, determine their speeds when
they reach the bottom. (here i found the speeds to be
velocity disk = sqrt(4/3hg)
velocity hoop = sqrt(hg)
now here is my problem
What is the ratio of their accelerations as they
roll down the incline, a_disk / a_hoop?
1. 4/3
2. 2
3. sqrt(3)
4. sqrt(3/2)
5. 1/2 xxxx
6. sqrt(4/3)
7. 1/3 xxxx
8. 3
9. 3/2
10. sqrt(2)
..ps - the ones i put an xxxx out the right on i figured couldn't be it since the velocity of the disk is greater the acceleration of the disk(top value) must be greater