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event_available2026-07-13
السؤال
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Chapter 4 Newton's Second Law of Motion
Converting Mass to Weight
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Objects with mass also have weight (although they can be weightless under special conditions). If
you know the mass of something in kilograms and want its weight in newtons, at Earth's surface,
you can take advantage of the formula that relates weight and mass.ed daiupnilab of golmisal dels
Weight mass × acceleration due to gravity
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W = mg
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This is in accord with Newton's Second Law, written as F=ma. When the force of gravity is the only
force, the acceleration of any object of mass m will be g, the acceleration of free fall. Importantly,
g acts as a proportionality constant, 10 N/kg, which is equivalent to 10 m/s².
Sample Question:
How much does a 1-kg bag of nails weigh on Earth?
W= mg = (1 kg)(10 m/s²) = 10 kg-m/s² = 10 N
or simply, W=mg = (1 kg)(10 N/kg) = 10 N.
From F=ma, we see that the unit of
force equals the units [kg x m/s²]. Can
you see the units [m/s²] = [N/kg]? M]
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Answer the following questions: quam sal (piew] feasm] isrit bisa ed video
1. Felicia the ballet dancer has a mass of 45.0 kg.
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b. Given that 1 kilogram of mass corresponds to 2.2 pounds at
ne to Earth's surface, what is Felicia's weight in pounds on Earth?
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sini ati nevewof nooMert to eoshua no no
a. What is Felicia's weight in newtons at Earth's surface?
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c. What would be Felicia's mass on the surface of Jupiter?
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d. What would be Felicia's weight on Jupiter's surface, where
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the acceleration due to gravity is 25.0 m/s²?
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2. Different masses are hung on a spring scale calibrated in newtons.ol sme ori nt nor
The force exerted by gravity on 1 kg = 10 N.
a. The force exerted by gravity on 5 kg =
b. The force exerted by gravity on
sno
10.28
ash to inu ((8) tenoitsmetril bis 10 N
N.
nowen] [menport.et
kg = 100 N.
of bassm of nommo ai fizisi2 bel
3. Make up your own mass and show the corresponding weight:
The force exerted by gravity on
kg =
Idpiew all th
N.
fnotwen] [colpil
~1kg
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