# physics

posted by .

If a trapeze artist rotates once each second while sailing through the air and contracts to reduce her rotational inertia to one-third of what it was, how many rotations per second will result?

• physics -

3 rotations/sec, since the
(moment of inertia)x(rotation rate) product must stay the same. It is a measure of angular momentum.

• physics -

3 rotations/sec, since the
(moment of inertia)x(rotation rate) product must stay the same. It is a measure of angular momentum.

## Similar Questions

1. ### physics

A trapeze artist, starting from rest, swings downward on the bar, lets go at the bottom of the swing, and falls freely to the net. An assistant, standing on the same platform as the trapeze artist, jumps from rest straight downward. …
2. ### physics

A trapeze artist, starting from rest, swings downward on the bar, lets go at the bottom of the swing, and falls freely to the net. An assistant, standing on the same platform as the trapeze artist, jumps from rest straight downward. …
3. ### Physics

The constant torque required to accelerate a disk (of rotational inertia I) from rest to a speed of f rotations per second in a time interval of t is:
4. ### PHYSICS

If a trapeze artist rotates twice each second while sailing through the air, and contracts to reduce her rotational inertia to one-third, how many rotations per second will result?
5. ### Physics help!

Suppose a revolving door at the bamk is spinning around once every 5 seconds. As you walk through, you push on the door for 2 seconds, which increases the rotational speed so that it rotates once a second. What was the rotational acceleration …

Suppose a revolving door at the bamk is spinning around once every 5 seconds. As you walk through, you push on the door for 2 seconds, which increases the rotational speed so that it rotates once a second. What was the rotational acceleration …
7. ### PHYSICS PLEASEEEE HELP ME

Suppose a revolving door at the bank is spinning around once every 5 seconds. As you walk through, you push on the door for 2 seconds, which increases that rotational speed so that it rotates once a second. What was the Rotational …
8. ### physics

A trapeze artist sailing through the air rotates with a rotational speed of 0.9·rev/s. If she contracts to reduce her rotational inertia to one sixth of what it was, what will her new rotational speed be?
9. ### Physics

A trapeze artist swings from one 35-ft long trapeze to another trapeze. She releases one trapeze at a 30 degree angle relative to the vertical. She flies through the air, catching the other trapeze 18 ft away at the same elevation. …
10. ### physics

A circle is cut out of a uniform piece of plywood. How does the rotational inertia measured around a point on its outer edge compare with the rotational inertia about its central axis?

More Similar Questions