Answer:1.6 rad/s
Explanation:
Given
moment of Inertia of disk 
radius of disc 
Force 
Torque 


using








Answer:
A. The speed of the wave increases four times.
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Drag is usually ignored because its effect on the horizontal velocity is usually negligible due to the short time of flight.
An object's surface area and geometry, along with the object's surrounding wind speed will affect the drag force.
In most cases, drag force will cause the object to land horizontally closer to the predicted landing point as drag is a resistive force.