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13 votes
12 answers
6k views

Why is acceleration directed inward when an object rotates in a circle?

Somebody (in a video about physics) said that acceleration goes in if you would rotate a ball on a rope around yourself. The other man (ex Navy SEAL, on YouTube too) said that obviously it goes out, ...
R S's user avatar
  • 349
1 vote
3 answers
595 views

Angular Acceleration v. Centripetal Acceleration

What is the difference between angular acceleration and centripetal acceleration? Don't they both apply to circular motion?
ah123's user avatar
  • 331
0 votes
0 answers
65 views

Does acceleration of the rim mean just tangential or both tangential and centripetal acceleration?

On my physics homework, the problem specifies that the acceleration of the rim of a flywheel can't exceed 100g. Does this mean that the tangential acceleration only, or the sum of the tangential and ...
Adrian's user avatar
  • 1
2 votes
1 answer
952 views

Kinematics for Non-Uniform Circular Motion

I'm trying to understand how kinematics for non-uniform circular motion. I know that you can represent the net acceleration of an object in non-uniform circular motion with the following equation: $$...
Vidul Mahendru's user avatar
0 votes
2 answers
542 views

Noninertial frame of reference

For a car that is accelerating linearly, the non-inertial frame of reference is the driver in the car where from his reference frame, the car is stationary. It is so called stationary because the non-...
newbie125's user avatar
  • 381