In another solar system,a planet has a moon that is 4.0 × 105 m in diameter.Measurements reveal that this moon takes 3.0 x 105 s to make each orbit of diameter 1.8 × 108 m.What is the mass of the planet? (G = 6.67 × 10-11 N ∙ m2/kg2)

A) 1.2 × 1024 kg B) 1.7 × 1024 kg C) 2.4 × 1024 kg D) 3.4 × 1024 kg E) 4.8 × 1024 kg A) 1.2 × 1024 kg B) 1.7 × 1024 kg C) 2.4 × 1024 kg D) 3.4 × 1024 kg E) 4.8 × 1024 kg

You are the science officer on a visit to a distant solar system.Prior to landing on a planet you measure its diameter to be 1.8 × 107 m.You have previously determined that the planet orbits 2.9 × 1011 m from its star with a period of 402 earth days.Once on the surface you find that the free-fall acceleration is 19.5 m/s2.What are the masses of (a)the planet and (b)the star? (G = 6.67 × 10-11 N ∙ m2/kg2)

A) (a)2.4 kg × $10^{25}$ kg, (b)1.2 kg × $10^{31}$ kg B) (a)4.3 kg × $10^{25}$ kg, (b)1.2 kg × $10^{31}$ kg C) (a)2.4 kg × $10^{25}$ kg, (b)7.1 kg × $10 ^ { 30 }$ kg D) (a)4.3 kg × $10^{25}$ kg, (b)7.1 kg × $10 ^ { 30 }$ kg A) (a)2.4 kg × $10^{25}$ kg, (b)1.2 kg × $10^{31}$ kg B) (a)4.3 kg × $10^{25}$ kg, (b)1.2 kg × $10^{31}$ kg C) (a)2.4 kg × $10^{25}$ kg, (b)7.1 kg × $10 ^ { 30 }$ kg D) (a)4.3 kg × $10^{25}$ kg, (b)7.1 kg × $10 ^ { 30 }$ kg

Exam 5: Circular Motion

The curved section of a speedway is a circular arc having a radius of 190 m.This curve is properly banked for racecars moving at 34 m/s.At what angle with the horizontal is the curved part of the speedway banked?

(Multiple Choice)

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Question 81

A small 175-g ball on the end of a light string is revolving uniformly on a frictionless surface in a horizontal circle of diameter 1.0 m.The ball makes 2.0 revolutions every 1.0 s. (a)What are the magnitude and direction of the acceleration of the ball? (b)Find the tension force that the string exerts on the ball.

(Short Answer)

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Question 82

In another solar system,a planet has a moon that is 4.0 × 10⁵ m in diameter.Measurements reveal that this moon takes 3.0 x 10⁵ s to make each orbit of diameter 1.8 × 10⁸ m.What is the mass of the planet? (G = 6.67 × 10^-11 N ∙ m²/kg²)

(Multiple Choice)

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Question 83

You are the science officer on a visit to a distant solar system.Prior to landing on a planet you measure its diameter to be 1.8 × 10⁷ m.You have previously determined that the planet orbits 2.9 × 10¹¹ m from its star with a period of 402 earth days.Once on the surface you find that the free-fall acceleration is 19.5 m/s².What are the masses of (a)the planet and (b)the star? (G = 6.67 × 10^-11 N ∙ m²/kg²)

(Multiple Choice)

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Question 84

A 20-g bead is attached to a light 120-cm-long string as shown in the figure.This bead moves in a horizontal circle with a constant speed of 1.5 m/s.What is the tension force that the string exerts on the bead if the angle α is measured to be 25°?

(Multiple Choice)

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Question 85

A 250-kg motorcycle goes around an unbanked turn of radius 13.7 m at a steady 96.5 km/h.What is the magnitude of the sum of the forces exerted on the motorcycle?

(Multiple Choice)

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Question 86

A spaceship is traveling to the Moon.At what point is there no more gravitational force exerted on it by Earth?

(Multiple Choice)

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Question 87

From what height above the surface of the earth should an object be dropped to initially have an acceleration of 0.54g? (G = 6.67 × 10^-11 N ∙ m²/kg²,M_earth = 5.97 × 10²⁴ kg,R_earth = 6.38 × 10⁶ m)

(Multiple Choice)

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Question 88

Pulling out of a dive,the pilot of an airplane guides his plane into a vertical circle.At the bottom of the dive,the speed of the airplane is 320 m/s.What is the smallest radius allowable for the vertical circle if the pilot's apparent weight (the force that the pilot exerts on the seat)is not to exceed 7.0 times his true weight?

(Multiple Choice)

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Question 89

A satellite having orbital speed V orbits a planet of mass M.If the planet had half as much mass,the orbital speed of the satellite at the same distance from the center would be

(Multiple Choice)

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Question 90

If you stood on a planet having a mass four times that of Earth's mass,and a radius two times that of Earth's radius,the gravitational force that the planet exerts on you would be

(Multiple Choice)

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Question 91

What is the proper banking angle for an Olympic bobsled to negotiate a 100-m radius turn at 35 m/s without skidding?

(Multiple Choice)

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Question 92

Asteroid Ida was photographed by the Galileo spacecraft in 1993,and the photograph revealed that the asteroid has a small moon,which has been named Dactyl.From the dimensions of Ida and its general features,one can estimate the mass of Ida to be 4.5 × 10¹⁶ kg,and the distance between Dactyl and Ida is approximately 90 km.Assuming a circular orbit,what would be the orbital speed of Dactyl? (G = 6.67 × 10^-11 N ∙ m²/kg²)

(Multiple Choice)

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Question 93

You need to design a wheel for testing purposes such that its rim will have an acceleration of 1.5 g when the rim is moving at 37 m/s while spinning.What should be the diameter of this wheel?

(Short Answer)

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Question 94

A satellite encircles Mars at a distance above its surface equal to 3 times the radius of Mars.If g_m is the free-fall acceleration at the surface of Mars,what is the free-fall acceleration at the location of the satellite?

(Multiple Choice)

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Question 95

Two planets have the same free-fall acceleration on the surface,but planet B has twice the mass of planet A.If planet A has radius r,what is the radius of planet B?

(Multiple Choice)

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Question 96

If a satellite moves with constant speed in a perfectly circular orbit around the earth,what is the direction of the acceleration of the satellite?

(Multiple Choice)

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Question 97

Sarah drives at a constant speed of 15 m/s around a circular horizontal curve of diameter 60 m.What are the magnitude and direction of her acceleration?

(Short Answer)

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Question 98

You are driving at $30.0 \mathrm {~m} / \mathrm { s }$ on a freeway curve of radius $25.0 \mathrm {~m}$ What is the magnitude of your acceleration?

(Multiple Choice)

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Question 99

Suppose NASA wants a satellite to revolve around Earth 5 times a day.What should be the radius of its orbit if we neglect the presence of the Moon? (G = 6.67 × 10^-11 N ∙ m²/kg²,M_earth = 5.97 × 10²⁴ kg)

(Multiple Choice)

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Question 100

Showing 81 - 100 of 119

Exam 5: Circular Motion

The curved section of a speedway is a circular arc having a radius of 190 m.This curve is properly banked for racecars moving at 34 m/s.At what angle with the horizontal is the curved part of the speedway banked?

In another solar system,a planet has a moon that is 4.0 × 105 m in diameter.Measurements reveal that this moon takes 3.0 x 105 s to make each orbit of diameter 1.8 × 108 m.What is the mass of the planet? (G = 6.67 × 10-11 N ∙ m2/kg2)

A 20-g bead is attached to a light 120-cm-long string as shown in the figure.This bead moves in a horizontal circle with a constant speed of 1.5 m/s.What is the tension force that the string exerts on the bead if the angle α is measured to be 25°?

A 250-kg motorcycle goes around an unbanked turn of radius 13.7 m at a steady 96.5 km/h.What is the magnitude of the sum of the forces exerted on the motorcycle?

A spaceship is traveling to the Moon.At what point is there no more gravitational force exerted on it by Earth?

From what height above the surface of the earth should an object be dropped to initially have an acceleration of 0.54g? (G = 6.67 × 10-11 N ∙ m2/kg2,Mearth = 5.97 × 1024 kg,Rearth = 6.38 × 106 m)

A satellite having orbital speed V orbits a planet of mass M.If the planet had half as much mass,the orbital speed of the satellite at the same distance from the center would be

If you stood on a planet having a mass four times that of Earth's mass,and a radius two times that of Earth's radius,the gravitational force that the planet exerts on you would be

What is the proper banking angle for an Olympic bobsled to negotiate a 100-m radius turn at 35 m/s without skidding?

You need to design a wheel for testing purposes such that its rim will have an acceleration of 1.5 g when the rim is moving at 37 m/s while spinning.What should be the diameter of this wheel?

A satellite encircles Mars at a distance above its surface equal to 3 times the radius of Mars.If gm is the free-fall acceleration at the surface of Mars,what is the free-fall acceleration at the location of the satellite?

Two planets have the same free-fall acceleration on the surface,but planet B has twice the mass of planet A.If planet A has radius r,what is the radius of planet B?

If a satellite moves with constant speed in a perfectly circular orbit around the earth,what is the direction of the acceleration of the satellite?

Sarah drives at a constant speed of 15 m/s around a circular horizontal curve of diameter 60 m.What are the magnitude and direction of her acceleration?

You are driving at 30.0 m/s30.0 \mathrm {~m} / \mathrm { s }30.0 m/s on a freeway curve of radius 25.0 m25.0 \mathrm {~m}25.0 m What is the magnitude of your acceleration?

Suppose NASA wants a satellite to revolve around Earth 5 times a day.What should be the radius of its orbit if we neglect the presence of the Moon? (G = 6.67 × 10-11 N ∙ m2/kg2,Mearth = 5.97 × 1024 kg)

Introduction

Kinematics: Motion in One Dimension

Newtonian Mechanics

Applying Newtons Laws

Impulse and Linear Momentum

Work and Energy

Extended Bodies at Rest

Rotational Motion

Gases

Static Fluids

Fluids in Motion

First Law of Thermodynamics

Second Law of Thermodynamics

Electric Charge force and Energy

The Electric Field

Dc Circuits

Magnetism

Electromagnetic Induction

Vibrational Motion

Mechanical Waves

Reflection and Refraction

Mirrors and Lenses

Wave Optics

Electromagnetic Waves

Special Relativity

Quantum Optics

Atomic Physics

Nuclear Physics

Particle Physics

Filters

In another solar system,a planet has a moon that is 4.0 × 10⁵ m in diameter.Measurements reveal that this moon takes 3.0 x 10⁵ s to make each orbit of diameter 1.8 × 10⁸ m.What is the mass of the planet? (G = 6.67 × 10^-11 N ∙ m²/kg²)

From what height above the surface of the earth should an object be dropped to initially have an acceleration of 0.54g? (G = 6.67 × 10^-11 N ∙ m²/kg²,M_earth = 5.97 × 10²⁴ kg,R_earth = 6.38 × 10⁶ m)

A satellite encircles Mars at a distance above its surface equal to 3 times the radius of Mars.If g_m is the free-fall acceleration at the surface of Mars,what is the free-fall acceleration at the location of the satellite?

You are driving at $30.0 \mathrm {~m} / \mathrm { s }$ on a freeway curve of radius $25.0 \mathrm {~m}$ What is the magnitude of your acceleration?

Suppose NASA wants a satellite to revolve around Earth 5 times a day.What should be the radius of its orbit if we neglect the presence of the Moon? (G = 6.67 × 10^-11 N ∙ m²/kg²,M_earth = 5.97 × 10²⁴ kg)