Which of the following statements is accurate?(a) Mass and weight are the same thing expressed in different units.(b) If an object has no weight, it must have no mass.(c) If the weight of an object varies, so must the mass.(d) Mass and inertia are different concepts.(e) Weight is always proportional to mass.

Which of the following statements is accurate?(a) Mass and weight are the same thing expressed in different units.(b) If an object has no weight, it must have no mass.(c) If the weight of an object varies, so must the mass.(d) Mass and inertia are different concepts.(e) Weight is always proportional to mass.

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter5: Newton's Law Of Motion

Section: Chapter Questions

Problem 8CQ: Which of the following statements is accurate? (a) Mass and weight are the same thing expressed In...

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Which of the following statements is accurate? (a) Mass and weight are the same thing expressed In different units. (b) If an object has no weight, it must have no mass. (c) If the weight of an object vanes, so must the mass. (d) Mass and inertia are different concepts. (e) Weight is always proportional to mass.
An astronaut weighing 193 lbs on Earth is on a mission to the Moon and Mars. (a) What would he weigh in newtons when he is on the Moon? The acceleration due to gravity on the Moon is one-sixth that on Earth. (b) How much would he weigh in newtons when he is on Mars, where the acceleration due to gravity is 0.38 times that on Earth? N (c) What is his mass in kilograms on Earth? kg (d) Which of the following are true? (Select all that apply.) His mass on the Moon is exactly equal to his mass on Earth. His mass on the Moon is smaller than his mass on Earth. His mass on Mars is smaller than his mass on Earth. His mass on Mars is exactly equal to his mass on Earth. His mass on the Moon is greater than his mass on Earth. His mass on Mars is greater than his mass on Earth.
A young South African girl has a mass of 40.0 kg. (a) What is her weight in newtons? (b) If she came to the United States, what would her weight be in pounds as measured on an American scale? Assume g=9.80 N/kg and 1Kg=2.2 lb.
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A newborn baby’s brain grows rapidly. In fact,it has been found to increase in mass by about 1.6 mg per minute.(a) How much does the brain’s weight increase in one day? (b) Howmuch time does it take for the brain’s weight to increase by 0.15 N?
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A student measures the weight of a puck and finds 365g. She wants to express her result using scientific notation. Which option below is the correct expression? Select one: 365 x 102 g 36.5 x 10' g 365 g 3.65 x 10° g
By using the resultant force and mass, the acceleration of a rocket can be calculated.The two forces act on rockets at the moment of launch - thrust upwards and the weight downwards. Weight is the force due to gravity and is calculated (at the Earth’s surface) by multiplying the mass (kilograms) by 9.8. The resultant force on each rocket is calculated using the equation Resultant force = Thrust – Weight.Acceleration is a measure of how much speed increases each second and is calculated using the equation Acceleration = Resultant force (newtons, N) divided by Mass (kilograms, kg).Example: If a model rocket’s mass is 50 grams and its rocket engine produces a thrust of 5N for 1 second; find the weight (50 g) change it to kilograms by dividing by 1000; giving a mass of 0.050 kg. Weight is mass (in kg) x 9.8, which gives 0.050 x 9.8 = 0.49N.The resultant force is the Thrust – Weight = 5N – 0.49 = 4.51N (unrounded).Acceleration= Resultant Force divided by Mass= 4.51 ÷ 0.050 = 90 m/sec.…
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