What is radial acceleration 1?no_redirect=1

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Tangential and radial acceleration

  • Thread starterMechaMZ
  • Start date

Homework Statement

A ball swings in a vertical circle at the end of a rope 1.50 m long. When the ball is 37.5° past the lowest point on its way up, its total acceleration is (-22.5 i + 20.2 j) m/s2.

The Attempt at a Solution

Determine the magnitude of its radial acceleration.

My attempt, but wrong answer.
1. total acceleration = 30.237, by resolving (-22.5 i + 20.2 j) m/s2 into R
2. build a geometry triangle, to calculate ar
30.237sin 37.5 = ar

Homework Statement

I think the ans should about 27-29m/s2

Homework Equations

The Attempt at a Solution

Answers and Replies

Related Introductory Physics Homework Help News on Phys.org
You found the magnitude of the total acceleration, but what about its direction?

Hint: Try working with each component of the total acceleration. How much of each component is in the radial direction?
I think I understand now, there shouldn't have any tangential acceleration for this uniform circular motion. so the R is the ac.
This isn't uniform circular motion and the acceleration will have a tangential component. But no need to guess. Figure out the direction of the acceleration and how it compares with the direction of the rope.