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. Force (F) = ? Mass (m) = 75 kg Gravity (g) = 9.8 m/s/s 2. Force (F) = 490N Mass (m) = ? Gravity (g) = 9.8 m/s/s Formula: F = mg Formula: m = F/g

. Force (F) = ? Mass (m) = 75 kg Gravity (g) = 9.8 m/s/s 2. Force (F) = 490N Mass (m) = ? Gravity (g) = 9.8 m/s/s Formula: F = mg Formula: m = F/g

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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How would I do these questions and round them to the nearest significant figure? I am having trouble with the multiplication rule of sig figs.

Worksheet: Weight = mass X gravity Weight is a measure of the gravitational force between the object and the Earth. The acceleration of gravity on Earth is 9.8 m/sec?. Weight is measured in units of Newtons. If one object has more mass than another then it weighs ( more / less ) than the other object. As an astronaut goes to the moon, his mass remains the same but his weight decreases. This is because as he got further away from the Earth, the acceleration of gravity decreases. Part 1: Weight Problems – acceleration and gravity are the same thing so F=ma is the same as F=mg. 1. Force (F) = ? Mass (m) = 75 kg Gravity (g) = 9.8 m/s/s 2. Force (F) = 490N Mass (m) = ? Gravity (g) = 9.8 m/s/s Formula: F = mg Formula: m = F/g Substitution: F = (75 kg)(9.8 m/s?) Substitution: m = 490 N/9.8 m/s² Answer: Answer: 3. What is the force on a 1 kg ball that is falling freely due to the pull of gravity? Force (F) = ? Formula: F = mg Mass (m) = 1 kg Substitution: F = (1 kg)(9.8 m/s?) Gravity (g) = 9.8 m/s² (assumed on Earth) Answer: ? 4. What is the mass of a person who weighs 500 N? Force (F) = 500 N Formula: m = F/g Mass (m) = ? Substitution: m = 500 N/9.8 m/s? Gravity (g) = 9.8 m/s² Answer: ? 5. What is the weight of an object (on earth) that has a mass of 45 kg? Force (F) = ? Formula: F = mg Mass (m) = 45 kg Substitution: F = (45 kg)(9.8 m/s?) Gravity (g) = 9.8 m/s² 6. The value of gravitational pull on the moon is 1.6 m/s/s. What is the weight of a 75 kg Answer: ? astronaut on the moon?
Transcribed Image Text:Worksheet: Weight = mass X gravity Weight is a measure of the gravitational force between the object and the Earth. The acceleration of gravity on Earth is 9.8 m/sec?. Weight is measured in units of Newtons. If one object has more mass than another then it weighs ( more / less ) than the other object. As an astronaut goes to the moon, his mass remains the same but his weight decreases. This is because as he got further away from the Earth, the acceleration of gravity decreases. Part 1: Weight Problems – acceleration and gravity are the same thing so F=ma is the same as F=mg. 1. Force (F) = ? Mass (m) = 75 kg Gravity (g) = 9.8 m/s/s 2. Force (F) = 490N Mass (m) = ? Gravity (g) = 9.8 m/s/s Formula: F = mg Formula: m = F/g Substitution: F = (75 kg)(9.8 m/s?) Substitution: m = 490 N/9.8 m/s² Answer: Answer: 3. What is the force on a 1 kg ball that is falling freely due to the pull of gravity? Force (F) = ? Formula: F = mg Mass (m) = 1 kg Substitution: F = (1 kg)(9.8 m/s?) Gravity (g) = 9.8 m/s² (assumed on Earth) Answer: ? 4. What is the mass of a person who weighs 500 N? Force (F) = 500 N Formula: m = F/g Mass (m) = ? Substitution: m = 500 N/9.8 m/s? Gravity (g) = 9.8 m/s² Answer: ? 5. What is the weight of an object (on earth) that has a mass of 45 kg? Force (F) = ? Formula: F = mg Mass (m) = 45 kg Substitution: F = (45 kg)(9.8 m/s?) Gravity (g) = 9.8 m/s² 6. The value of gravitational pull on the moon is 1.6 m/s/s. What is the weight of a 75 kg Answer: ? astronaut on the moon?
7. A space ship has a mass of 9000 kg. The space ship is launched from Earth and lands on a distant planet where it has a weight of 390000 N. What is the acceleration of gravity on this planet? Force (F) = 390000 N Formula: g = F/m Mass (m) = 9000 kg Substitution: g= 390000 N/9000 kg Gravity (g) = ? Answer: ? 8. Big Bertha tips the scales at 950 Newtons. What is her mass? Force (F) = 950 N Formula: m = F/g Mass (m) = ? Substitution: m= 950 N/9.8 m/s? Gravity (g) = 9.8 m/s² Answer: ? 9. If my mass is 100 kilograms, what is my weight? Force (F) = ? Formula: F = mg Mass (m) = 100 kg Substitution: F = (100 kg)(9.8 m/s?) || Gravity (g) = 9.8 m/s² 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.
Transcribed Image Text:7. A space ship has a mass of 9000 kg. The space ship is launched from Earth and lands on a distant planet where it has a weight of 390000 N. What is the acceleration of gravity on this planet? Force (F) = 390000 N Formula: g = F/m Mass (m) = 9000 kg Substitution: g= 390000 N/9000 kg Gravity (g) = ? Answer: ? 8. Big Bertha tips the scales at 950 Newtons. What is her mass? Force (F) = 950 N Formula: m = F/g Mass (m) = ? Substitution: m= 950 N/9.8 m/s? Gravity (g) = 9.8 m/s² Answer: ? 9. If my mass is 100 kilograms, what is my weight? Force (F) = ? Formula: F = mg Mass (m) = 100 kg Substitution: F = (100 kg)(9.8 m/s?) || Gravity (g) = 9.8 m/s² 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.
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