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) A clock has a second hand which rubs against the inside of the glass cover. If the frictional force between the glass cover and the tip of the hand...
1.) A clock has a second hand which rubs against the inside of the glass cover. If the frictional force between the glass cover and the tip of the hand is 0.0020 N and the length of the hand is 8 cm, what minimum torque must be supplied to the hand by the clock mechanism if the hand is not to stop?2.) The figure shows four masses held at the corners of a rectangle by light rods. Find the moment of rotational inertia a) about the x-axis. b) about the y-axis. c) about the z-axis (perpendicular to the page, passing through the origin).What magnitude torque is necessary to give the object an angular acceleration of 1.5 rad/s2 a) along the x-axis? b) along the y-axis? c) along the z-axis (perpendicular to the page, passing through the origin)?
