Hello,

I need some assistance with energy and collision formulas and problems.

Thank you

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Hello,

I need some assistance with energy and collision formulas and problems.

Thank you

I need some assistance with energy and collision formulas and problems.

Thank you

- cmsevero
**Posts:**1**Joined:**Wed Mar 26, 2014 1:11 pm**Location:**PA, USA

Yes, some of those problems can get confusing. When you add in there are various types of collisions such as elastic and non-elastic, I don't blame you for needing help.

Could you give us a specific formula or problem that you are having a difficult time with? Let us know what it is about the formula or problem that you don't understand as we don't just "do homework" for you.

Could you give us a specific formula or problem that you are having a difficult time with? Let us know what it is about the formula or problem that you don't understand as we don't just "do homework" for you.

- the_hill1962
- PATH Tutor
**Posts:**102**Joined:**Tue Feb 19, 2008 1:23 pm**Location:**Texas, USA

Conservation of momentum is more fundamental than conservation of energy - since inelastic interactions may convert some of the energy to heat.

Objects that bounce off each other (if not too fast) are generally elastic, and both momentum and energy are conserved.

Objects that stick together after the collision are Inelastic, and only conservation of momentum applies.

Yes, we would like to see examples WITH YOUR WORK so we can see where you are getting stuck.

DrPhil (not the TV guy)

Objects that bounce off each other (if not too fast) are generally elastic, and both momentum and energy are conserved.

Objects that stick together after the collision are Inelastic, and only conservation of momentum applies.

Yes, we would like to see examples WITH YOUR WORK so we can see where you are getting stuck.

DrPhil (not the TV guy)

- DrPhil
- PATH Room Leader
**Posts:**89**Joined:**Sat Mar 26, 2005 12:50 pm**Location:**New Mexico

As a result of his observations, R¨omer concluded

that the time interval between eclipses

of Io by Jupiter increased by 17.2 min during

a 6.6 month period as the Earth moved

from a point in its orbit where its motion

is toward Jupiter to a diametrically opposite

point where it moves away from Jupiter. The

presently accepted value of the speed of light

in vacuum is 2.998 × 108 m/s.

Find an average value for the distance between

the Earth and the Sun.

Answer in units of km

that the time interval between eclipses

of Io by Jupiter increased by 17.2 min during

a 6.6 month period as the Earth moved

from a point in its orbit where its motion

is toward Jupiter to a diametrically opposite

point where it moves away from Jupiter. The

presently accepted value of the speed of light

in vacuum is 2.998 × 108 m/s.

Find an average value for the distance between

the Earth and the Sun.

Answer in units of km

- mohammed123
**Posts:**2**Joined:**Sun May 04, 2014 7:29 pm

i cannot figure out the answer, please help me

- mohammed123
**Posts:**2**Joined:**Sun May 04, 2014 7:29 pm

This may be easier than it seems.

Consider the two points on the Earth's orbit, as described.

The difference of light travel time to the two points is 17.2 minutes.

The speed of light is 2.998x10^8 m/s.

How far apart are the two points?

How are the two points related to the distance of each from the Sun?

Consider the two points on the Earth's orbit, as described.

The difference of light travel time to the two points is 17.2 minutes.

The speed of light is 2.998x10^8 m/s.

How far apart are the two points?

How are the two points related to the distance of each from the Sun?

- DrPhil
- PATH Room Leader
**Posts:**89**Joined:**Sat Mar 26, 2005 12:50 pm**Location:**New Mexico

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