Author Question: A string is wrapped around a pulley with a radius of 2.0 cm. The pulley is initially at rest. A ... (Read 220 times)

azncindy619 · **on:** Jul 29, 2018

A string is wrapped around a pulley with a radius of 2.0 cm. The pulley is initially at rest. A constant force of 50 N is applied to the string, causing the pulley to rotate and the string to unwind.

If the string unwinds 1.2 m in 4.9 s, what is the moment of inertia of the pulley?
A)

0.17 kgm2

B)

17 kgm2

C)

14 kgm2

D)

0.20 kgm2

E)

0.017 kgm2

Question 2

A current that is sinusoidal with respect to time is referred to as

A)

a direct current.
B)

an alternating current.