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Centripetal Force

A "swing" ride at a carnival consists of chairs that are swung in a circle by 12.0 m cables attached to a vertical rotating pole. Suppose the total mass of a chair and its occupant is 220 kg. (a) Determine the tension in the cable attached to the chair. (b) Find the speed of the chair.

Subject:

Physics

Topic:

Other

Posting ID:

5146

OTA ID:

102950

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Working with vertical circular motion.

A fighter pilot dives his plane toward the ground at 230 m/s. He pulls out of the dive on a vertical circle. What is the minimum radius of the circle, so that the normal force exerted on the pilot by his seat never exceeds three times his weight?

Subject:

Physics

Topic:

Other

Posting ID:

5157

OTA ID:

102950

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Modern Physics

A rocket is used to place a synchronous satellite in orbit about the earth. What is the speed of the satellite in orbit?

Subject:

Physics

Topic:

Other

Posting ID:

5158

OTA ID:

103060

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Calculating the work done in a given situation with constant force.

A person removes a 10.5 kg stereo amplifier from a shelf that is 1.82 m high. The amplifier is lowered at a constant speed to a height of 0.75 m. What is the work done by (a) the person (b) the gravitational force that acts on the amplifier

Subject:

Physics

Topic:

Other

Posting ID:

5434

OTA ID:

103060

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Calculating a star's radial velocity using Ha lines.

The Ha line (Hydrogen) of a certain star is received on Earth at a wavelength of 656 nm. What is the star's radial velocity with respect to the Earth?

Subject:

Physics

Topic:

Other

Posting ID:

5445

OTA ID:

103447

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