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

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• 1 month ago

How long is the minute hand?

• 1 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.

• Guber
Lv 5
1 month ago

Ideally, zero.  If an object is moving at a constant velocity, then its acceleration is zero.

• 1 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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• 1 month ago

Is it moving at a constant angular velocity? Then it's just the centripetal acceleration.

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