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# LPH 105 5:6-10

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## Richard Datwyler

on 13 May 2016

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#### Transcript of LPH 105 5:6-10

What is the ratio of the force on the moon from the earth vs the force on the moon from the sun?
What is the acceleration due to gravity, if you could "stand" on the surface of the sun, what is it at the diastance of the earth?
How long does it take mars to go around the sun knowing that the earth takes 365.25 days?
How long does it take Uranus and Neptune?
84
165 years

686.8 days
At an airport lugage is dropped onto moving belts, some are shaped like a cone, as shown here with an angle of 25 degrees.
If the radius at the point shown for this suit case is 1.25 m, and it has a coefficent of static friction of .55, how fast can the suit case be moving before it starts to slide?
F
F
F
G
f
N
r
y
An amusment park ride is shaped like a cylindar with a radius of 5.5 m. if it moves around at a speed of 30 rpm when the floor drops out, what coefficient of static friction is needed to keep the people from slipping down?
50
15
25
.5
.25
A 50 kg mass is suspended by a pulley system and is attached to a 15 kg block with a coefficent of kinetic friction with the table of .25, while a 25 kg block with coefficent of .5 rests on it.
Find the tension in both ropes,
the acceleration of the 15 kg block
and the speed of the 50 kg mass after falling .5 m
"could you go over question 2? Could you also walk through some of the equations or make sure we have some that are focused with kepler's laws?"
"Can we go over the forces that are found in nature?"
"sometimes I get confused (also in my calculator) when numbers are in the #x10^# format..."
"What processes are happening in our body to make us feel weightlessness?"
Using Newton's law of gravity and the inside cover of your text book, what is the magnitude of the force of the sun on the earth? (answer should look like '2.34 X 10^14 N')
2 : 4.3
274 m/s^2
.0059 m/s^2

3
2
1
F
F
F
F
F
T
f
f
1on2
G
N
F
T
T
G
.18
T=227 N
a=.891 m/s^2
v=.67 m/s
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