Question 1

Ordinary forces, such as pushes, pulls, normal forces and friction, are considered to be due to the

Accepted Answer

A) gravitational force. 
B) electromagnetic force. 
C) strong nuclear force. 
D) weak nuclear force. 
E) contact force. 
A) gravitational force. 
B) electromagnetic force. 
C) strong nuclear force. 
D) weak nuclear force. 
E) contact force.

Question 2

Kepler's third law can be used to compare the Moon's orbit around the Earth to the orbit of the Earth around the Sun.

Accepted Answer

A) True 
 B)False

Question 3

You are on an airplane traveling with a constant velocity at an altitude of 20,000 m. What is the acceleration of gravity at that altitude? The radius of Earth is 6.37 × 106 m.

Accepted Answer

A) 9.81 m/s2 
B) 9.78 m/s2 
C) 9.75 m/s2 
D) 9.72 m/s2 
E) 9.69 m/s2 
A) 9.81 m/s2 
B) 9.78 m/s2 
C) 9.75 m/s2 
D) 9.72 m/s2 
E) 9.69 m/s2

Question 4

An elevator accelerates upward with an acceleration equal to the acceleration of gravity. A ray of light emitted from one wall inside the elevation at a height h relative to the floor of the elevator will hit the opposite wall at a height (relative to the floor)

Accepted Answer

A) greater than h. 
B) less than h. 
C) equal to h. 
A) greater than h. 
B) less than h. 
C) equal to h.

Question 5

An object with mass m is located halfway between an object of mass M and an object of mass 3M that are separated by a distance d. What is the magnitude of the force on the object with mass m?

Accepted Answer

A) 8GMm/d2  
B) 4GMm/d2  
C) 3GMm/2d2  
D) GMm/(2d2) 
E) GMm/(4d2) 
A) 8GMm/d2  
B) 4GMm/d2  
C) 3GMm/2d2  
D) GMm/(2d2) 
E) GMm/(4d2)

Question 6

State Einstein's principle of equivalence.

Accepted Answer

There is no experiment observe

Question 7

Kepler's second law tells us that a planet sweepa out equal areas in equal times. If you compare the amount of area per time swept by Earth with the one of Jupiter, you would conclude:

Accepted Answer

A) They sweep the same area per time. 
B) Jupiter sweeps a larger area per time because it has much more mass than Earth. 
C) Jupiter sweeps a larger area per time because it has a much larger orbital path than Earth. 
D) Earth sweeps a larger area per time because it has much less mass than Jupiter. 
E) Earth sweeps a larger area per time because it has a much smaller orbital path than Jupiter. 
A) They sweep the same area per time. 
B) Jupiter sweeps a larger area per time because it has much more mass than Earth. 
C) Jupiter sweeps a larger area per time because it has a much larger orbital path than Earth. 
D) Earth sweeps a larger area per time because it has much less mass than Jupiter. 
E) Earth sweeps a larger area per time because it has a much smaller orbital path than Jupiter.

Question 8

The reason that when an object falls towards Earth, Earth does not move toward the object, is that the force exerted by Earth on the object is so much bigger.

Accepted Answer

A) True 
 B)False

Question 9

A geosynchronous satellite is one that stays above the same point on the Earth, which is possible only if it is above one of the Earth's poles.

Accepted Answer

A) True 
 B)False

Question 10

What is the period of a satellite circling Mars 100 km above the planet's surface? The mass of Mars is 6.42 × 1023 kg, its radius is 3.40 × 106 m, and G = 6.67 × 10-11 m3/kg/s2.

Accepted Answer

A) 1.75 hours 
B) 1.25 hours 
C) 1.15 hours 
D) 1.00 hours 
E) 1.45 hours 
A) 1.75 hours 
B) 1.25 hours 
C) 1.15 hours 
D) 1.00 hours 
E) 1.45 hours

Question 11

At what altitude should a satellite be placed into circular orbit so that its orbital period is 48.0 hours? The mass of the earth is 5.976 × 1024 kg and the radius of the earth is 6.378 × 106 m.

Accepted Answer

A) 4.22 × 107 m 
B) 7.58 × 107 m 
C) 8.22 × 107 m 
D) 6.07 × 107 m 
E) 6.71 × 107 m 
A) 4.22 × 107 m 
B) 7.58 × 107 m 
C) 8.22 × 107 m 
D) 6.07 × 107 m 
E) 6.71 × 107 m

Question 12

A thin uniform spherical shell exerts zero force on a particle located inside of the thin shell.

Accepted Answer

A) True 
 B)False

Question 13

Neptune circles the Sun at a distance of 4.50 × 1012 m once every 164 years. Saturn circles the Sun at a distance of 1.43 × 1012 m. What is the orbital period of Saturn?

Accepted Answer

A) 304 years 
B) 121 years 
C) 109 years 
D) 88.6 years 
E) 29.4 years 
A) 304 years 
B) 121 years 
C) 109 years 
D) 88.6 years 
E) 29.4 years

Question 14

Assuming that the gravitational acceleration is constant and equal, in magnitude, to the acceleration of gravity at the surface of the earth, how far would light deflect from a straight line path as it travels one Earth diameter, 1.28 × 107 m?

Accepted Answer

A) 25.4 cm 
B) 8.94 mm 
C) 3.14 m 
D) 1.77 cm 
E) 12.7 cm 
A) 25.4 cm 
B) 8.94 mm 
C) 3.14 m 
D) 1.77 cm 
E) 12.7 cm

Question 15

By how many newtons does the weight of a 100-kg person change when he goes from sea level to an altitude of 5000 m? (The mean radius of the Earth is 6.38 × 106 m.)

Accepted Answer

A) 0.6 N 
B) 1.6 N 
C) 2.6 N 
D) 3.6 N 
E) 5.2 N 
A) 0.6 N 
B) 1.6 N 
C) 2.6 N 
D) 3.6 N 
E) 5.2 N

Question 16

A planet of mass M has a moon of mass m in a circular orbit of radius R. An object is placed between the planet and the moon on the line joining the center of the planet to the center of the moon so that the net gravitational force on the object is zero. How far is the object placed from the center of the planet?

Accepted Answer

A)   
  R 
B)    R 
C)    R 
D)   
  R 
E)    R 
A)   
  R 
B)    R 
C)    R 
D)   
  R 
E)    R

Question 17

A satellite is in a circular parking orbit 6.98 × 106 m from the center of Earth. To initiate a Hohmann transfer, a rocket gives it an accelerating thrust so that its speed is increased to 8300 m/s. How far from the center of Earth will the satellite be when it reaches its apogee? The mass of Earth is 5.97 × 1024 kg and G = 6.67 x 10-11 N•m2/kg2.

Accepted Answer

A) 3.12 × 107 m 
B) 2.48 × 107m 
C) 1.06 × 107m 
D) 6.73 × 107m 
E) 4.75 × 107m 
A) 3.12 × 107 m 
B) 2.48 × 107m 
C) 1.06 × 107m 
D) 6.73 × 107m 
E) 4.75 × 107m

Question 18

An astronaut is piloting a spacecraft, which is in a circular orbit around Earth. A space station is ahead, on the same circular orbit. If he fires his rockets briefly to decrease the forward speed of the rocket, what will happen?

Accepted Answer

The spacecraft will be put into an ellip

Question 19

Describe how a satellite is placed into orbit and remains in orbit around the earth.

Accepted Answer

A satellite is put into orbit by acceler

Question 20

You ride on an elevator that is moving upward with constant speed while standing on a bathroom scale. The reading on the scale is

Accepted Answer

A) equal to your true weight, mg. 
B) more than your true weight, mg. 
C) less than your true weight, mg. 
D) zero. 
E) could be more or less than your true weight, mg, depending on the value of the speed. 
A) equal to your true weight, mg. 
B) more than your true weight, mg. 
C) less than your true weight, mg. 
D) zero. 
E) could be more or less than your true weight, mg, depending on the value of the speed.

Exam 6: Gravitation and Newtons6 Synthesis

Ordinary forces, such as pushes, pulls, normal forces and friction, are considered to be due to the

Kepler's third law can be used to compare the Moon's orbit around the Earth to the orbit of the Earth around the Sun.

You are on an airplane traveling with a constant velocity at an altitude of 20,000 m. What is the acceleration of gravity at that altitude? The radius of Earth is 6.37 × 106 m.

An elevator accelerates upward with an acceleration equal to the acceleration of gravity. A ray of light emitted from one wall inside the elevation at a height h relative to the floor of the elevator will hit the opposite wall at a height (relative to the floor)

An object with mass m is located halfway between an object of mass M and an object of mass 3M that are separated by a distance d. What is the magnitude of the force on the object with mass m?

State Einstein's principle of equivalence.

Kepler's second law tells us that a planet sweepa out equal areas in equal times. If you compare the amount of area per time swept by Earth with the one of Jupiter, you would conclude:

The reason that when an object falls towards Earth, Earth does not move toward the object, is that the force exerted by Earth on the object is so much bigger.

A geosynchronous satellite is one that stays above the same point on the Earth, which is possible only if it is above one of the Earth's poles.

What is the period of a satellite circling Mars 100 km above the planet's surface? The mass of Mars is 6.42 × 1023 kg, its radius is 3.40 × 106 m, and G = 6.67 × 10-11 m3/kg/s2.

At what altitude should a satellite be placed into circular orbit so that its orbital period is 48.0 hours? The mass of the earth is 5.976 × 1024 kg and the radius of the earth is 6.378 × 106 m.

A thin uniform spherical shell exerts zero force on a particle located inside of the thin shell.

Neptune circles the Sun at a distance of 4.50 × 1012 m once every 164 years. Saturn circles the Sun at a distance of 1.43 × 1012 m. What is the orbital period of Saturn?

Assuming that the gravitational acceleration is constant and equal, in magnitude, to the acceleration of gravity at the surface of the earth, how far would light deflect from a straight line path as it travels one Earth diameter, 1.28 × 107 m?

By how many newtons does the weight of a 100-kg person change when he goes from sea level to an altitude of 5000 m? (The mean radius of the Earth is 6.38 × 106 m.)

An astronaut is piloting a spacecraft, which is in a circular orbit around Earth. A space station is ahead, on the same circular orbit. If he fires his rockets briefly to decrease the forward speed of the rocket, what will happen?

Describe how a satellite is placed into orbit and remains in orbit around the earth.

You ride on an elevator that is moving upward with constant speed while standing on a bathroom scale. The reading on the scale is

Introduction, Measurement, Estimating

Describing Motion: Kinematics in One Dimension

Kinematics in Two or Three Dimensions; Vectors

Dynamics: Newtons Laws of Motion

Using Newtons Laws: Friction, Circular Motion, Drag Forces

Work and Energy

Conservation of Energy

Linear Momentum

Rotational Motion

Angular Momentum; General Rotation

Static Equilibrium; Elasticity and Fracture

Fluids

Oscillations

Wave Motion

Sound

Temperature, Thermal Expansion, and the Ideal Gas Law

Kinetic Theory of Gases

Heat and the First Law of Thermodynamics

Second Law of Thermodynamics

Electric Charge and Electric Field

Gausss Law

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Capacitance, Dielectrics, Electric Energy Storage

Electric Currents and Resistance

Dc Circuits

Magnetism

Sources of Magnetic Field

Electromagnetic Induction and Faradays Law

Inductance, Electromagnetic Oscillations, and Ac Circuits

Maxwells Equations and Electromagnetic Waves

Light: Reflection and Refraction

Lenses and Optical Instruments

The Wave Nature of Light; Interference

Diffraction and Polarization

Special Theory of Relativity

Early Quantum Theory and Models of the Atom

Quantum Mechanics

Quantum Mechanics of Atoms

Molecules and Solids

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Nuclear Energy: Efects and Uses of Radiation

Elementary Particle

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You are on an airplane traveling with a constant velocity at an altitude of 20,000 m. What is the acceleration of gravity at that altitude? The radius of Earth is 6.37 × 10⁶ m.

What is the period of a satellite circling Mars 100 km above the planet's surface? The mass of Mars is 6.42 × 10²³ kg, its radius is 3.40 × 10⁶ m, and G = 6.67 × 10^-¹¹ m³/kg/s².

At what altitude should a satellite be placed into circular orbit so that its orbital period is 48.0 hours? The mass of the earth is 5.976 × 10²⁴ kg and the radius of the earth is 6.378 × 10⁶ m.

Neptune circles the Sun at a distance of 4.50 × 10¹² m once every 164 years. Saturn circles the Sun at a distance of 1.43 × 10¹² m. What is the orbital period of Saturn?

Assuming that the gravitational acceleration is constant and equal, in magnitude, to the acceleration of gravity at the surface of the earth, how far would light deflect from a straight line path as it travels one Earth diameter, 1.28 × 10⁷ m?

By how many newtons does the weight of a 100-kg person change when he goes from sea level to an altitude of 5000 m? (The mean radius of the Earth is 6.38 × 10⁶ m.)