Write FACT if the statement is true and BLUFF if not. 1. The gravitational force exerted by the Earth on an object is equivalent to the object's weight. _2. Gravity is a contact force that acts between two separate objects. _3. Anything that goes up ultimately goes down. 4. The principle of gravity was discovered by Sir Isaac Newton. 5. Gravity on the Moon is greater than on Earth. _6. Gravitational pull between objects increases as the distance between them decreases. _7. The greater the mass of an object, the greater the pull of gravity on it. 8. Mass is the measure of how much matter there is in a body or object. 9. Gravity does not depend on the masses of the object and the distance between two objects. 10. Weight is the force that gravity exerts on an object.

Write FACT if the statement is true and BLUFF if not. 1. The gravitational force exerted by the Earth on an object is equivalent to the object's weight. _2. Gravity is a contact force that acts between two separate objects. _3. Anything that goes up ultimately goes down. 4. The principle of gravity was discovered by Sir Isaac Newton. 5. Gravity on the Moon is greater than on Earth. _6. Gravitational pull between objects increases as the distance between them decreases. _7. The greater the mass of an object, the greater the pull of gravity on it. 8. Mass is the measure of how much matter there is in a body or object. 9. Gravity does not depend on the masses of the object and the distance between two objects. 10. Weight is the force that gravity exerts on an object.

Name: Write FACT if the statement is true and BLUFF if not.1. The gravitati
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Description: Write FACT if the statement is true and BLUFF if not.1. The gravitational force exerted by the Earth on an objectis equivalent to the object's weight._2. Gravity is a contact force that acts between two separateobjects.3. Anything that goes up ultim

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter2: Newton's Laws

Section: Chapter Questions

Problem 10C

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A mountain 10.0 km from a person exerts a gravitational force on him equal to 2.00 of his weight. (a) Calculate the mass of the mountain. (b) Compare the mountain’s mass with that of Earth. (c) What is unreasonable or inconsistent? (Note that accurate gravitational measurements can easily detect the effect of nearby mountains and variations in local geology.)
Use Keplers second law to convince yourself that Earth must move faster in its orbit during the northern hemisphere winter, when it is closest to the Sun, than during the summer, when it is farthest from the Sun.
Tidal friction is slowing the rotation of the Earth. As a result, the orbit of the Moon is increasing in radius at a rate of approximately 4 cm/year. Assuming this to be a constant rate, how many years will pass before the radius of the Moon's orbit increases by 3.84106 m (1%)?
According to the National Academy of Sciences, the Earths surface temperature has risen about 1F since 1900. There is evidence that this climate change may be due to human activity. The organizers of World Jump Day argue that if the Earth were in a slightly larger orbit, we could avoid global warming and climate change. They propose that we move the Earth into this new orbit by jumping. The idea is to get people in a particular time zone to jump together. The hope is to have 600 million people jump in a 24-hour period. Lets see if it will work. Consider the Earth and its inhabitants to make up the system. a. Estimate the number of people in your time zone. Assume they all decide to jump at the same time; estimate the total mass of the jumpers. b. What is the net external force on the Earthjumpers system? c. Assume the jumpers use high-tech Flybar pogo sticks (Fig. P8.32), which allow them to jump 6 ft. What is the displacement of the Earth as a result of their jump? d. What happens to the Earth when the jumpers land?
Perhaps you’ve noticed that the rockets used to put satellites and spacecraft into orbit are usually launched from pads near the equator. Why is this so? Is the fact that rockets are usually launched to the east also important? Why?
Respond to each statement, true or false: (a) No force of gravity acts on an astronaut in an orbiting space station. (b) At three Earth radii from the center of Earth, the acceleration of gravity is one-ninth its surface value. (c) If two identical planets, each with surface gravity g and volume V, coalesce into one planet with volume 2V, the surface gravity of the new planet is 2g. (d) One kilogram of gold would have greater value on Earth than on the Moon.
A 15.0-kg object is in free fall near the surface of the Earth. What is its weight? What is its acceleration? What is the direction of the gravitational force exerted on it? How do your answers change if the same object is at rest on the surface of the Earth?
Unreasonable Results (a) Based on Kepler's laws and information on the orbital characteristics of the Moon, calculate the orbital radius for an Earth satellite having a period of 1.00 h. (b) What is unreasonable about this result? (c) What is unreasonable or inconsistent about the premise of a 1.00 h orbit?
Additional Problems A synchronous satellite. which always remains above the same point on a planet's equator, is put in circular orbit around Jupiter to study that planet's famous red spot. Jupiter rotates once every 9.84 h. Use the data of Table 7.3 to find the altitude of the satellite.
It has been suggested that rotating cylinders about 20 km in length and 8 km in diameter be placed in space and used as colonies. The purpose of the rotation is to simulate gravity for the inhabitants. Explain this concept for producing an effective imitation of gravity.
Calculate the mass of the Sun based on data for Earth's orbit and compare the value obtained with the Sun's actual mass.
Astrology, that unlikely and vague pseudoscience, makes much of the position of the planets at the moment of one's birth. The only known force a planet exerts on Earth is gravitational. (a) Calculate the magnitude of the gravitational force exerted on a 4.20 kg baby by a 100 kg father 0.200 m away at birth (he is assisting, so he is close to the child) (b) Calculate the magnitude of the force on the baby due to Jupiter if it is at its closest distance to Earth, some 6.291011 m away. How does the force of Jupiter on the baby compare to the force of the father on the baby? Other objects in the room and the hospital building also exert similar gravitational forces. (Of course, there could be an unknown force acting, but scientists first need to be convinced that there is even an effect, much less that an unknown force causes it.)