Universe
11th Edition
ISBN: 9781319039448
Author: Robert Geller, Roger Freedman, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 4, Problem 34Q
To determine
The weight of a person in pounds as well as in newtons, and his/her mass in kilograms.
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Students have asked these similar questions
F=ma
F = force (N)
m = mass (kg)
a= acceleration (m/s2)
When dealing with the acceleration due to
gravity:
W=mg
W = weight (N)
g = acceleration due to gravity
(9.8 m/s2 for surface of Earth)
Warmup:
and
Force is measured in
acceleration is measured in
and mass is measured in
If we know the force exerted on an object (in Newtons) and we know the mass of the object (in
kilograms) we can easily find the acceleration the object experiences by dividing the
the
by
If we know the force exerted on an object (in Newtons) and we know how fast the object accelerates
(in m/s?) then we can easily find the mass of the object experiences by dividing the
the
by
if we know the mass of an object in kilograms, and we know the acceleration that an object
experiences then we can calculate the force exerted on that object by multiplying the
unit!
The mass of the Earth is 5.972 x 1024 kg. What would be the weight in Newtons of this much mass? How much weight would this be in pounds?
You step on the scale and it says 1200kg. Your brother steps on the scale and it’s says 250 pounds. Who is heavier, you or your brother?
An orange weighs about 1N. What is the mass of orange in grams?
If a scale says 80 kg after you step on it, is that a measure of your weight? Explain your answer.
Which is heavier, a 2kg feather or a 19.6 N nails? Explain your answer.
Does a 25-g object on Earth will have the same weight if placed on the Moon? Explain your answer. What is the weight of the object both on Earth and on Moon?
Chapter 4 Solutions
Universe
Ch. 4 - Prob. 1CCCh. 4 - Prob. 2CCCh. 4 - Prob. 3CCCh. 4 - Prob. 4CCCh. 4 - Prob. 5CCCh. 4 - Prob. 6CCCh. 4 - Prob. 7CCCh. 4 - Prob. 8CCCh. 4 - Prob. 9CCCh. 4 - Prob. 10CC
Ch. 4 - Prob. 11CCCh. 4 - Prob. 12CCCh. 4 - Prob. 13CCCh. 4 - Prob. 14CCCh. 4 - Prob. 15CCCh. 4 - Prob. 16CCCh. 4 - Prob. 17CCCh. 4 - Prob. 18CCCh. 4 - Prob. 19CCCh. 4 - Prob. 20CCCh. 4 - Prob. 21CCCh. 4 - Prob. 22CCCh. 4 - Prob. 23CCCh. 4 - Prob. 24CCCh. 4 - Prob. 1CLCCh. 4 - Prob. 2CLCCh. 4 - Prob. 1QCh. 4 - Prob. 2QCh. 4 - Prob. 3QCh. 4 - Prob. 4QCh. 4 - Prob. 5QCh. 4 - Prob. 6QCh. 4 - Prob. 7QCh. 4 - Prob. 8QCh. 4 - Prob. 9QCh. 4 - Prob. 10QCh. 4 - Prob. 11QCh. 4 - Prob. 12QCh. 4 - Prob. 13QCh. 4 - Prob. 14QCh. 4 - Prob. 15QCh. 4 - Prob. 16QCh. 4 - Prob. 17QCh. 4 - Prob. 18QCh. 4 - Prob. 19QCh. 4 - Prob. 20QCh. 4 - Prob. 21QCh. 4 - Prob. 22QCh. 4 - Prob. 23QCh. 4 - Prob. 24QCh. 4 - Prob. 25QCh. 4 - Prob. 26QCh. 4 - Prob. 27QCh. 4 - Prob. 28QCh. 4 - Prob. 29QCh. 4 - Prob. 30QCh. 4 - Prob. 31QCh. 4 - Prob. 32QCh. 4 - Prob. 33QCh. 4 - Prob. 34QCh. 4 - Prob. 35QCh. 4 - Prob. 36QCh. 4 - Prob. 37QCh. 4 - Prob. 38QCh. 4 - Prob. 39QCh. 4 - Prob. 40QCh. 4 - Prob. 41QCh. 4 - Prob. 42QCh. 4 - Prob. 43QCh. 4 - Prob. 44QCh. 4 - Prob. 45QCh. 4 - Prob. 46QCh. 4 - Prob. 47QCh. 4 - Prob. 48QCh. 4 - Prob. 49QCh. 4 - Prob. 50QCh. 4 - Prob. 51QCh. 4 - Prob. 52QCh. 4 - Prob. 53QCh. 4 - Prob. 54QCh. 4 - Prob. 55QCh. 4 - Prob. 56QCh. 4 - Prob. 57QCh. 4 - Prob. 58Q
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- What is the weight (in Newton) of a 2 kg gift package on the Earth?arrow_forwardA newly discovered planet has four times the mass of the Earth, but a person’s weight on the new planet's surface is the same as the person’s weight on the Earth's surface. What is the radius of the new planet in terms of the radius R of Eartharrow_forwardYou may attempt this question 3 more times for credit. In this problem, we will directly calculate the surface gravity and your weight on another planet. In metric, your weight is measured in "Newtons", and 1 Newton = 1 kg m / s². Newton's constant G = 6.67 x 10-11 m³/(kg s²). Earth has a mass = 5.97 x 1024 kg and a radius of 6378 km. You should be able to verify that g = 9.8 m/s² on Earth using the formula for surface gravity. If your mass is 64 kg, you should also be able to verify you should weigh 626 Newtons. If you can do that you should be OK for what's next. The mass of Venus is 4.87E+24 kg, and it's radius is 6.05E+3 km. What is the surface gravity of this planet? (Watch your units!). m/s² If your mass is 64 kg, what would you weigh on Venus? Newtons. Note: Remember if your answer requires scientific notation to use the "e" notation: "1.1 x 105" is "1.1e5" to OWL.arrow_forward
- If a person weighs 240 lb on Earth, that person's weight on the Moon would be what? The moon's mass is about 1/81 that of earth, and diameter about 27% that of earth. O 480 lbs 80 lbs 120lbs 16 lbs O 40 lbsarrow_forwardThe acceleration of gravity on the surface of the moon is 1.62 m/s squared. If an astronaut weighs 746 N on earth, what is the weight of the astronaut when on the moon?arrow_forwardWhat is 91 miles per hour in units of meters per second? Give your answer rounded to 1 digit after the decimal place.arrow_forward
- Kinetic energy can be found using the formula Ek=12mv2Ek=12mv2. The variable EkEk represents kinetic energy, the variable mm is the mass in pounds (lbs.), and the variable vv is the velocity in feet per second (ftsfts). What is a possible unit of measure for kinetic energy and why?arrow_forwardWhat is the difference between weight and mass? What units are used to measure weight, and which are used for mass?arrow_forwardOn Mars my sister’s dog weighs 62 N. What is its mass in kg? (Mars acceleration of gravity is 3.7 m/s2). Give your answer in kilograms with one decimal place.arrow_forward
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