5. If the earth had three times the radius but the same mass, how would this change the weight of the object?6. If a 3 kg object is falling at terminal velocity, what upward force of air resistance does it experience?7. A 20 kg falling object experiences 5 N of air resistance. What is the acceleration of this object?

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Physics

5. If the earth had three times the radius but the same mass, how would this change the weight of the object?

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter7: Rotational Motion And The Law Of Gravity

Section: Chapter Questions

Problem 10WUE: (a) Find the magnitude of the gravity force between a planet with mass 5.98 1024 kg and its moon,...

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(a) Find the magnitude of the gravity force between a planet with mass 5.98 1024 kg and its moon, with mass 7.36 1022 kg, if the average distance between them is 3.84 108 m. (b) What is the acceleration of the moon toward the planet? (c) What is the acceleration of the planet toward the moon? (See Section 7.5.)
Astronauts walking on the Moon are seen bounding rather than walking normally. Why?
1. Where would the acceleration from gravity be greatest and least? In Death Valley (elevation –290 ft.), on the top of the world’s tallest building, the Burj Khalifa (elevation 2,720 ft.) or Mount Everest (elevation 29,029 ft.) 2. Find your weight in Newtons.
6. An astronaut has a weight of 500 N on the Earth. What is his/her weight on the planet with g = 0.65 m/s². (assume: g = 9.81 m/s² for the acceleration due to gravity on the Earth).
6. Newtons Laws a. Write Newton's First law.. b. Write Newton's Second law. c. Write Newtons Third law. 7. A bowling ball and a feather are dropped from a height of 100 ft. The bowling ball weighs 12 Ibs and the feather weighs 3 ounces. a. What is the Force (in Newtons) of both objects? b. The value of g is varies depending on what planet you are on. Bigger planets have a larger value of g. The value of g on the moon is 1.62 m/s². Calculate the forces of these objects falling on the moon.
You are an astronaut, and NASA has asked you to determine how mass and weight change throughout the solar system. They have provided you with a rover with a mass of 227 kg on Earth. What is the rover's mass on the Moon?Moon's gravity=1.60ms2 A. 142 N B. 227 kg C. 0.007 kg D. 363 N
w = mg Suppose your mass is 77 kg. GEarth = 9.8 m/s² IMoon = 1.62 m/s² 1. What is your weight on Earth? 2. What is your weight on Moon? 3. Compare your weights on Moon and on Earth.
3. The mass of a particle is 18 kg. a. What is its weight on Earth? b. What is its weight on the Moon? c. What is its mass on the Moon? d. What is its weight in outer space far from any celestial body? e. What is its mass at this point?
21. Two objects with equal masses of 1 kg each are separated by a distance of 1 m. The gravitational force between the objects is: a. Slightly less than G b. Slightly greater than G c. Equal to G d. Half as much as G 22. An apple hangs on a tree on the Earth. Which of the following statements is correct? a. The force on the apple is greater than the force on the Earth because the Earth is more massive. b. The force on the Earth is greater than the force on the apple because the Earth is more massive. c. The force on the apple is less than the force on the Earth because the tree is supporting the apple. d. The forces on the apple and Earth are equal.
21. A 10 N bob swings on a long massless string as a simple pendulum. The tension in the string has a maximum value of 14 N. Find the centripetal acceleration at that point. 2 m/s2 3 m/s2 4 m/s2 6 m/s2 0.4 m/s2
49. A 615-kg racing car completes one lap in 14.3 s around a circular track with a radius of 50.0 m. The car moves at constant speed. a. What is the acceleration of the car? b. What force must the track exert on the tires to produce this acceleration? 50. An athlete whirls in a 7.00-kg hammer tied to the end of a 1.3-m chain in a horizontal circle. The hammer makes one revolution in 1.0 s. a. What is the centripetal acceleration of the hammer? b. What is the tension in the chain?
9. If my mass is 100 kilograms, what is my weight? Force (F) = Formula: Mass (m) = Substitution: Gravity (g) = Answer: 10. The elevator in the new office building warns that it can safely lift 300 kg at one time. If John (850 N), Betty (530 N), Robert (740 N) and Alice (610 N) all get in the elevator at once, can the elevator safely carry them up to the third floor? Think! Show all work.