Answered: A ball on a 3.7 m string is spun in a…

Physics for Scientists and Engineers

10th Edition

ISBN:9781337553278

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter4: Motion In Two Dimensions

Section: Chapter Questions

Problem 20P: An athlete swings a ball, connected to the end of a chain, in a horizontal circle. The athlete is...

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A ball on a 3.7 m string is spun in a horizontal circle. The ball's tangential velocity is 1.9 m/s. What is the centripetal acceleration of the ball?

A. 0.98 m/s²

B. 0.61 m/s²

C. 7.0 m/s²

D. 7.2 m/s²

A 2.1 kg ball on a string is spun in a horizontal circle. The ball's tangential velocity is 1.9 m/s. What is the tension on the string?

A. 1.1 N

B. 2.1 N

C. 4.1 N

D. 3.3 N

Two balls, X and Y, are spun at a velocity of 6.5 m/s in a horizontal circle on the path shown below. Ball X has a mass of 1.3 kg, and ball Y has a mass of 0.81 kg. Which statement best describes the centripetal acceleration and centripetal forces on the balls?

A. Both balls will experience equal centripetal force and centripetal acceleration.

B. Ball X will experience greater centripetal force and greater centripetal acceleration.

C. Ball Y will experience greater centripetal force, but ball X will experience greater centripetal acceleration.

D. Both balls will experience the same centripetal acceleration, but ball X will experience greater centripetal force.

A 2.8 kg ball is spun on a 1.6 m string in a vertical circle at a constant velocity of 4.0 m/s.

A. 0.56 N

B. 18 N

C. 28 N

D. 55 N

What is the tension on the string at the side of the circle?

A. 0.56 N

B. 18 N

C. 28 N

D. 55 N

Which statement describes the sun's position relative to planetary orbits?

A. The sun is at the center of each planet's circular orbit.

B. The sun is midway between the foci of each planet's elliptical orbit.

C. The sun is one focus of each planet's elliptical orbit.

D. The sun alternates between the two foci of planetary orbits.

Which statement applies best to the orbit of a satellite?

A. Satellites are objects in continual free fall.

B. Earth's magnetic field keeps satellites from crashing to Earth.

C. All satellites remain in orbit above a fixed position on Earth.

D. Satellites closer to Earth maintain their orbits the longest.

A wildlife preserve has two elephants. One has a mass of 6140 kg. The other has a mass of 4020 kg. What is the gravitational attraction between the elephants when they are 17 m apart?

A. 9.7 x 10^-5 N

B. 5.7 x 10^-6 N

C. 8.5 x 10⁴N

D. 5.6 x 10¹⁶ N

What is the gravitational force on a 987 kg satellite orbiting 5.1 x 10⁴ m above the surface of Earth? Assume the mass of Earth is 5.97 x 10²⁴ kg. Show your work.

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