A particle weight 120N on the surface of the earth. At what height above the surface will its weight be 30N? Radius of the
earth= 6400 Km.
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yes it's weight will be 30
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Weight at Earth’s surface = W = 120 NWeight at a height h from Earth’s surface = W’ = 30 N
W and W’ are related as
W’ = W [R / (R + h)]^2
W’ / W = [R / (R + h)]^2
30 / 120 = [R / (R + h)]^2
1/2 = R / (R + h)
R + h = 2R
h = R
∴ It’s weight will be 30 N at a height equal to radius of Earth (R)
HOPE THIS HELPS!!!
W and W’ are related as
W’ = W [R / (R + h)]^2
W’ / W = [R / (R + h)]^2
30 / 120 = [R / (R + h)]^2
1/2 = R / (R + h)
R + h = 2R
h = R
∴ It’s weight will be 30 N at a height equal to radius of Earth (R)
HOPE THIS HELPS!!!
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