Asmall ball with mass 1.20 kg is mounted on one end of a rod 0.860 m long and of negligible mass. the system rotates in a horizontal circle about the other end of the rod at 5100 rev/min.
(a) calculate the rotational inertia of the system about the axis of rotation.
(b) there is an air drag of 2.60 x 10.

0.88752 kgm²

0.02236 Nm

Explanation:

m = Mass of ball = 1.2 kg

L = Length of rod = 0.86 m

= Angle = 90°

Rotational inertia is given by

The rotational inertia is 0.88752 kgm²

Torque is given by

The torque is 0.02236 Nm

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

c) up is the direction the magnetic force is acting on the charge.