Question

Un hamster esta sentado sobre un tocadisco cuya rapidez angular es constante si el hamster se mueve a un punto localizado al doble de la distancia del centro entonces su rapidez lineal...
a) sera la mitad
b) se duplica
c) se mantendra igual

Answer 1

Answer:

b) se duplica

Explanation:

The disk is moving with constant angular velocity, let's call it $\omega$.

The linear velocity of a point on the disk is given by

$v=\omega r$

where r is the distance of the point from the axis of rotation.

In this problem, the object is moved at a distance twice as far as the initial point, so

$r' = 2r$

Therefore, the new linear velocity is

$v'=\omega r' = \omega (2r) = 2 \omega r = 2 v$

So, the velocity has doubled, and the correct answer is

b) se duplica