# What is the acceleration of the extreme tip of the minute hand of the wall clock?

### 5 Answers

- Andrew SmithLv 71 month ago
THE wall clock implies a specific clock. Let me take a large synchronous electric clock. with a 0.2 m radius hand. The acceleration is w^2 r = (2*pi()/3600)^2 * 0.2 ~= 6.1 * 10 ^ -7 m/s^2. Any "escapement" clock moves in jerks and the acceleration is quite high each "tick" but there is insufficient information to know what that acceleration is.

- GuberLv 51 month ago
Ideally, zero. If an object is moving at a constant velocity, then its acceleration is zero.

- ?Lv 71 month ago
The minute hand has a constant angular velocity

i.e. 2π radians per hour

Note, the hour hand also has constant angular velocity

i.e. 2π radians per 12 hours

or, π/6 radians per hour

Often, time does appear to accelerate, but this is due to my age and perspective.

:)>

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- RealProLv 71 month ago
Is it moving at a constant angular velocity? Then it's just the centripetal acceleration.