An object of mass 0.50 kg is transported to the surface of Planet X where the object's weight is measured to be 20 N.The radius of the planet is 4.0 × 106 m.What free fall acceleration will the 0.50-kg object experience when at the surface of Planet X?

A) 48 m/s2 B) 20 m/s2 C) 16 m/s2 D) 40 m/s2 A) 48 m/s2 B) 20 m/s2 C) 16 m/s2 D) 40 m/s2

A Ferris wheel,rotating initially at an angular speed of 0.500 rad/s,accelerates over a 7.00-s interval at a rate of 0.040 0 rad/s2.What angular displacement does the Ferris wheel undergo in this 7-s interval?

A) 4.48 rad B) 2.50 rad C) 3.00 rad D) 0.500 rad A) 4.48 rad B) 2.50 rad C) 3.00 rad D) 0.500 rad

An object of mass 0.50 kg is transported to the surface of Planet X where the object's weight is measured to be 20 N.The radius of the planet is 4.0 × 106 m.What free fall acceleration will the 0.50-kg object experience when transported to a distance of 2.0 × 106 m from the surface of this planet?

A) 90 m/s2 B) 20 m/s2 C) 13 m/s2 D) 18 m/s2 A) 90 m/s2 B) 20 m/s2 C) 13 m/s2 D) 18 m/s2

Exam 7: Rotational Motion and the Law of Gravity

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Somewhere between the Earth and the Moon is a point where the gravitational attraction of the Earth is canceled by the gravitational pull of the Moon.The mass of the Moon is 1/81 that of the Earth.How far from the center of the Earth is this point?

(Multiple Choice)

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Question 61

At what angle (relative to the horizontal)should a curve 52 m in radius be banked if no friction is required to prevent the car from slipping when traveling at 12 m/s? (g = 9.8 m/s²)

(Multiple Choice)

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Question 62

An object of mass 0.50 kg is transported to the surface of Planet X where the object's weight is measured to be 20 N.The radius of the planet is 4.0 × 10⁶ m.What free fall acceleration will the 0.50-kg object experience when at the surface of Planet X?

(Multiple Choice)

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Question 63

A point on the rim of a 0.25-m-radius rotating wheel has a centripetal acceleration of 4.0 m/s².What is the angular speed of the wheel?

(Multiple Choice)

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Question 64

An airplane in a wide sweeping "outside" loop can create zero gees inside the aircraft cabin.What must be the radius of curvature of the flight path for an aircraft moving at 150 m/s to create a condition of "weightlessness" inside the aircraft?

(Multiple Choice)

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Question 65

The end of the cutting cord on a gas-powered weed cutter is 0.15 m in length.If the motor rotates at the rate of 20 rev/s,what is the tangential speed of the end of the cord?

(Multiple Choice)

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Question 66

An object when orbiting the Earth at a height of three Earth radii from the center of the Earth has a weight of 1.00 N.What is the object's mass? (g at the surface of the Earth is 9.8 m/s²)

(Multiple Choice)

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Question 67

A cylindrical space colony 8 km in diameter and 30 km long has been proposed as living quarters for future space explorers.Such a habitat would have cities,land and lakes on the inside surface and air and clouds in the center.All this would be held in place by the rotation of the cylinder about the long axis.How fast would such a cylinder have to rotate to produce a 1-g gravitational field at the walls of the cylinder?

(Multiple Choice)

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Question 68

You are facing east looking at the clock on the wall.You see the second hand moving clockwise (of course).In what direction is the angular velocity vector for this second hand?

(Multiple Choice)

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Question 69

A Ferris wheel,rotating initially at an angular speed of 0.500 rad/s,accelerates over a 7.00-s interval at a rate of 0.040 0 rad/s².What angular displacement does the Ferris wheel undergo in this 7-s interval?

(Multiple Choice)

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Question 70

According to Kepler's second law,Halley's Comet circles the Sun in an elliptical path with the Sun at one focus of the ellipse.What is at the other focus of the ellipse?

(Multiple Choice)

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Question 71

The distance from the center of a Ferris wheel to a passenger seat is 12 m.What centripetal acceleration does a passenger experience when the wheel's angular speed is 0.50 rad/s?

(Multiple Choice)

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Question 72

An asteroid has a perihelion (the orbit's closest approach to the sun)of 1.5 AU and a period of revolution of 8.0 y.What is its greatest distance from the sun (its aphelion)?

(Multiple Choice)

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Question 73

What angular speed (in revolutions/second)is needed for a centrifuge to produce an acceleration of 1 000 g at a radius arm of 15.0 cm?

(Multiple Choice)

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Question 74

A ceiling fan is turned on and reaches an angular speed of 120 rev/min in 20 s.It is then turned off and coasts to a stop in 40 s.In the one minute of rotation,through how many revolutions did the fan turn?

(Multiple Choice)

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Question 75

Starting from rest,a wheel undergoes constant angular acceleration for a period of time T.At which of the following times does the average angular acceleration equal the instantaneous angular acceleration?

(Multiple Choice)

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Question 76

An object of mass 0.50 kg is transported to the surface of Planet X where the object's weight is measured to be 20 N.The radius of the planet is 4.0 × 10⁶ m.What free fall acceleration will the 0.50-kg object experience when transported to a distance of 2.0 × 10⁶ m from the surface of this planet?

(Multiple Choice)

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Question 77

For a point on a spinning disc in uniform circular motion,which of the following is not constant?

(Multiple Choice)

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Question 78

Calculate the linear speed due to the Earth's rotation for a person at a point on its surface located at 40° N latitude.The radius of the Earth is 6.40 × 10⁶ m.

(Multiple Choice)

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Question 79

An object of mass 0.50 kg is transported to the surface of Planet X where the object's weight is measured to be 20 N.The radius of the planet is 4.0 × 10⁶ m.What is the mass of Planet X? (G = 6.67 × 10−¹¹ N ⋅ m²/kg²)

(Multiple Choice)

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Question 80

Showing 61 - 80 of 84

Exam 7: Rotational Motion and the Law of Gravity

Somewhere between the Earth and the Moon is a point where the gravitational attraction of the Earth is canceled by the gravitational pull of the Moon.The mass of the Moon is 1/81 that of the Earth.How far from the center of the Earth is this point?

At what angle (relative to the horizontal)should a curve 52 m in radius be banked if no friction is required to prevent the car from slipping when traveling at 12 m/s? (g = 9.8 m/s2)

An object of mass 0.50 kg is transported to the surface of Planet X where the object's weight is measured to be 20 N.The radius of the planet is 4.0 × 106 m.What free fall acceleration will the 0.50-kg object experience when at the surface of Planet X?

A point on the rim of a 0.25-m-radius rotating wheel has a centripetal acceleration of 4.0 m/s2.What is the angular speed of the wheel?

An airplane in a wide sweeping "outside" loop can create zero gees inside the aircraft cabin.What must be the radius of curvature of the flight path for an aircraft moving at 150 m/s to create a condition of "weightlessness" inside the aircraft?

The end of the cutting cord on a gas-powered weed cutter is 0.15 m in length.If the motor rotates at the rate of 20 rev/s,what is the tangential speed of the end of the cord?

An object when orbiting the Earth at a height of three Earth radii from the center of the Earth has a weight of 1.00 N.What is the object's mass? (g at the surface of the Earth is 9.8 m/s2)

You are facing east looking at the clock on the wall.You see the second hand moving clockwise (of course).In what direction is the angular velocity vector for this second hand?

A Ferris wheel,rotating initially at an angular speed of 0.500 rad/s,accelerates over a 7.00-s interval at a rate of 0.040 0 rad/s2.What angular displacement does the Ferris wheel undergo in this 7-s interval?

According to Kepler's second law,Halley's Comet circles the Sun in an elliptical path with the Sun at one focus of the ellipse.What is at the other focus of the ellipse?

The distance from the center of a Ferris wheel to a passenger seat is 12 m.What centripetal acceleration does a passenger experience when the wheel's angular speed is 0.50 rad/s?

An asteroid has a perihelion (the orbit's closest approach to the sun)of 1.5 AU and a period of revolution of 8.0 y.What is its greatest distance from the sun (its aphelion)?

What angular speed (in revolutions/second)is needed for a centrifuge to produce an acceleration of 1 000 g at a radius arm of 15.0 cm?

A ceiling fan is turned on and reaches an angular speed of 120 rev/min in 20 s.It is then turned off and coasts to a stop in 40 s.In the one minute of rotation,through how many revolutions did the fan turn?

Starting from rest,a wheel undergoes constant angular acceleration for a period of time T.At which of the following times does the average angular acceleration equal the instantaneous angular acceleration?

For a point on a spinning disc in uniform circular motion,which of the following is not constant?

Calculate the linear speed due to the Earth's rotation for a person at a point on its surface located at 40° N latitude.The radius of the Earth is 6.40 × 106 m.

An object of mass 0.50 kg is transported to the surface of Planet X where the object's weight is measured to be 20 N.The radius of the planet is 4.0 × 106 m.What is the mass of Planet X? (G = 6.67 × 10−11 N ⋅ m2/kg2)

Introduction

Introduction: Part A

Motion in One Dimension

Motion in One Dimension: Part A

Vectors and Two-Dimensional Motion

Vectors and Two-Dimensional Motion: Part A

The Laws of Motion

The Laws of Motion: Part A

Energy

Energy: Part A

Momentum and Collisions

Momentum and Collisions: Part A

Rotational Motion and the Law of Gravity: Part A

Rotational Equilibrium and Rotational Dynamics

Rotational Equilibrium and Rotational Dynamics: Part A

Solids and Fluids

Solids and Fluids: Part A

Thermal Physics

Thermal Physics: Part A

Energy in Thermal Processes Heat and Internal Energy

Energy in Thermal Processes Heat and Internal Energy: Part A

The Laws of Thermodynamics Work in Thermodynamic Processes

The Laws of Thermodynamics Work in Thermodynamic Processes: Part A

Vibrations and Waves

Vibrations and Waves: Part A

Sound

Sound: Part A

Electric Forces and Electric Fields

Electric Forces and Electric Fields: Part A

Electrical Energy and Capacitance

Electrical Energy and Capacitance: Part A

Current and Resistance Electric Current

Current and Resistance Electric Current: Part A

Direct-Current Circuits Sources of EMF

Direct-Current Circuits Sources of EMF: Part A

Magnetism Magnets

Magnetism Magnets: Part A

Induced Voltages and Inductance

Induced Voltages and Inductance: Part A

Alternating-Current Circuits and Electromagnetic Waves

Alternating-Current Circuits and Electromagnetic Waves: Part A

Reflection and Refraction of Light

Reflection and Refraction of Light: Part A

Mirrors and Lenses

Mirrors and Lenses: Part A

Wave Optics

Wave Optics: Part A

Optical Instruments

Optical Instruments: Part A

Relativity

Relativity: Part A

Quantum Physics Blackbody Radiation and Plancks Hypothesis

Quantum Physics Blackbody Radiation and Plancks Hypothesis: Part A

Atomic Physics

Atomic Physics: Part A

Nuclear Physics

Nuclear Physics: Part A

Nuclear Energy and Elementary Particles

Nuclear Energy and Elementary Particles: Part A

Particle Collisions, Mediating Photons, and Quark Structures: Exploring the Fundamentals of Physics

Filters

At what angle (relative to the horizontal)should a curve 52 m in radius be banked if no friction is required to prevent the car from slipping when traveling at 12 m/s? (g = 9.8 m/s²)

An object of mass 0.50 kg is transported to the surface of Planet X where the object's weight is measured to be 20 N.The radius of the planet is 4.0 × 10⁶ m.What free fall acceleration will the 0.50-kg object experience when at the surface of Planet X?

A point on the rim of a 0.25-m-radius rotating wheel has a centripetal acceleration of 4.0 m/s².What is the angular speed of the wheel?

An object when orbiting the Earth at a height of three Earth radii from the center of the Earth has a weight of 1.00 N.What is the object's mass? (g at the surface of the Earth is 9.8 m/s²)

A Ferris wheel,rotating initially at an angular speed of 0.500 rad/s,accelerates over a 7.00-s interval at a rate of 0.040 0 rad/s².What angular displacement does the Ferris wheel undergo in this 7-s interval?

Calculate the linear speed due to the Earth's rotation for a person at a point on its surface located at 40° N latitude.The radius of the Earth is 6.40 × 10⁶ m.

An object of mass 0.50 kg is transported to the surface of Planet X where the object's weight is measured to be 20 N.The radius of the planet is 4.0 × 10⁶ m.What is the mass of Planet X? (G = 6.67 × 10−¹¹ N ⋅ m²/kg²)