It decreases

Hope it helps

The answer is D light rays shine on an object which then reflects back to our retina

**Answer:**

A-18500J

B-232.5 rad/s

**Explanation:**

A- As the cylinder rotates through 1000rad, it sweeps a distance of

So the work, which is distance times force, of the tension done on the cylinder through that distance is

W = Td = 50 * 370 = 18500 J[/tex]

B- The torque that exerts on the cylinder by the tension is

To = TR = 50*0.37 = 18.5 Nm

As the cylinder is hollow, its moments of inertia is

The torque is generating an angular acceleration of:

The time it takes to go from rest to 1000 rad

Therefore the final rotational speed is

You can look up the def I think

The formula for mass you can find from the density equation. Multiply the volume by both sides of the equation.

density = mass/volume

volume*density = mass

And there you are :)