Show all work and don’t forget units! 1 A box has a mass of 8.00 kg. Knowing tha
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Question
Show all work and don’t forget units!
1 A box has a mass of 8.00 kg. Knowing that the strength of the gravitational field is 9.8 N/kg, calculate the force of gravity on the box.
2 A box of cereal has a mass of 250 g. What is the force of gravity on the box, knowing that the strength of the gravitational field strength is 9.8 N/kg?
3 The Earth exerts a gravitational force of 500 N on Amy. What is Amy’s mass in kg?
4 The Earth exerts a gravitational force of 500 N on Amy. What is Amy’s mass in g?
5 The strength of the gravitational field on the Moon is 1.6 N/kg. If a rock on the moon weighs 200 N, how much does the same rock weigh on the earth?
6 A rock has a mass of 5.00 kg on the moon. What is the mass of the rock on the earth?
Explanation / Answer
given data
1.m=8kg, g=9.8 N/Kg
force of gravity on the box=?
from newtons second law=
Fg=mg
Fg=8*9.8
Fg=78.4 m/s^2
2.m=250g=0.250kg
g = 9.8N/kg
Fg = m*g
Fg=0.250*9.8
Fg=2.45 m/s^2
3.F=500N
on earth g=9.8m/s^2
m=?
F=mg
500 = m*9.8
m=51.020 kg
4.
.F=500N
on earth g=9.8m/s^2
m=?
F=mg
500 = m*9.8
m=51.020 kg=51020 grams
5.
strength of the gravitational field on the Moon is g=1.6 N/kg
rock weight= m*gravity on moon = 200N
m*1.6=200
m=125 kg
weight on earth =m*g on earth = 125*9.8 = 1225 N
6.
m=5kg
mass is constant everywhere. so mass in moon= mass on earth=5kg
weight on earth =?