Posted by **Jesse** on Sunday, September 23, 2007 at 9:23pm.

I have some physics problems that I would like to get checked please?

- Physics -
**Jesse**, Sunday, September 23, 2007 at 9:25pm
1.Can something have energy without having momentum?

-No, it can have P.E. and no K.E., however if the object has no K.E. then it doesn’t have no velocity therefore it has no momentum.

3. If a 20 kg object fell to the surface of the Earth from a height of 30 m, what would its final velocity be? (work this problem from the standpoint of linear motion.)

-I got 24.23 m/s

4. If a 20 kg object fell to the surface of the Earth from a height of 30m, what would its final velocity be? (work this problem from the energy standpoint.) Should you get the same answer as you did in question 3? (This one I am not too sure)

-I got 39.60 m/s

- Physics -
**drwls**, Sunday, September 23, 2007 at 10:40pm
1. Yes, if the energy is not kinetic

3 and 4

In both cases V = sqrt(2gH)= 24.2 m/s

- Physics -
**amber**, Thursday, October 6, 2011 at 7:49pm
If a 20 kg object fell to the surface of the Earth from a height of 30m, what would its final velocity be? (work this problem from the energy standpoint.) Should you get the same answer as you did in question 3? how do you work out this problem?

## Answer This Question

## Related Questions

- Algebra problems - I have some problems that I would like checked please. Find ...
- Physics - A 56.6kg hiker starts at an elevation of 1270m and climbs to the top ...
- algebra - I have a few math questions I made them just like my actual problems ...
- Science-Physics - The metre was originally defined as a fraction of the distance...
- General - Please understand that I am not upset with anyone or whatever I just ...
- Physics Homework - I have a few questions that I dont understand and would like ...
- math - It certainly pays to check your work! I just took a HUGE science test. I ...
- physics - hey i have a some questions i am trying to solve for practice, because...
- science - What would happen if the temperature of the tundra increased by 20*F? ...
- math - So I've been having trouble solving some problems. Mainly problems that ...

More Related Questions