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23 Nov 2019
1. The moonpulls on Earthâs oceans and causes thetides.
a) Assume the moon is directly overhead. What is the ratio Fmoon/Fearth of the gravitational forces of the moon andearthexerted on you?
b) How close would the Earth need to be to the Sun (center tocenterdistance) in order for the Sun to lift you off of the Earth?Do notguess, calculate your answer!
2. If you place a cubic block of wood of side L=0.1 manddensity P wood=600 kg/m^3 on the surface of a lake, the blockwillsink a distance y<L down into thewater.
a) How far will the block sink?
b) A frog of mass m=60 g leaps onto the top of the block. Nowhowfar does the block sink?
Hint: draw a free body diagram of the block. Ask yourself: istheblock in equilibrium?
1. The moonpulls on Earthâs oceans and causes thetides.
a) Assume the moon is directly overhead. What is the ratio Fmoon/Fearth of the gravitational forces of the moon andearthexerted on you?
b) How close would the Earth need to be to the Sun (center tocenterdistance) in order for the Sun to lift you off of the Earth?Do notguess, calculate your answer!
2. If you place a cubic block of wood of side L=0.1 manddensity P wood=600 kg/m^3 on the surface of a lake, the blockwillsink a distance y<L down into thewater.
a) Assume the moon is directly overhead. What is the ratio Fmoon/Fearth of the gravitational forces of the moon andearthexerted on you?
b) How close would the Earth need to be to the Sun (center tocenterdistance) in order for the Sun to lift you off of the Earth?Do notguess, calculate your answer!
2. If you place a cubic block of wood of side L=0.1 manddensity P wood=600 kg/m^3 on the surface of a lake, the blockwillsink a distance y<L down into thewater.
a) How far will the block sink?
b) A frog of mass m=60 g leaps onto the top of the block. Nowhowfar does the block sink?
Hint: draw a free body diagram of the block. Ask yourself: istheblock in equilibrium?
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Nelly StrackeLv2
6 May 2019