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allstar1
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angular velocity help!
Hi, I need help with the following 2 questions. My answers have *********
next to them. Any help is appreciated. Thank you.
1. A disk is rotating at a constant rate about a vertical axis through its center. Point Q is twice as far from the center of the disk as point P is. The angular velocity of Q at a given time is
Choices:
a) twice as big as P's
b) the same as P's *******************
c) half as big as P's
d) none of the above
i believe it's the same as P's, since and poing on radius r, has the same velocity on any point on the radius line.
2. When a disk rotates counterclockwise at a constant rate about a vertical axis through its center, the tangential acceleration of a point on the rim is
Choices:
a) positive.
b) zero. *******************
c) negative.
d) impossible to determine without more information.
i believe it's zero, since it's rotating at a constant rate, which means the acceleration is zero.
Any help is appreciated. Thank you.
Hi, I need help with the following 2 questions. My answers have *********
next to them. Any help is appreciated. Thank you.
1. A disk is rotating at a constant rate about a vertical axis through its center. Point Q is twice as far from the center of the disk as point P is. The angular velocity of Q at a given time is
Choices:
a) twice as big as P's
b) the same as P's *******************
c) half as big as P's
d) none of the above
i believe it's the same as P's, since and poing on radius r, has the same velocity on any point on the radius line.
2. When a disk rotates counterclockwise at a constant rate about a vertical axis through its center, the tangential acceleration of a point on the rim is
Choices:
a) positive.
b) zero. *******************
c) negative.
d) impossible to determine without more information.
i believe it's zero, since it's rotating at a constant rate, which means the acceleration is zero.
Any help is appreciated. Thank you.
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