Intro to Conservation of Energy Video Lessons

Concept

# Problem: Two meteoroids are heading for earth. Their speeds as they cross the moon's orbit are 2.0 km/s.A) The first meteoroid is heading straight for earth. What is its speed of impact?(B) The second misses the earth by 4500 km. What is its speed at its closest point?

###### FREE Expert Solution

Expression of conservation of mechanical energy:

$\overline{){{\mathbf{K}}}_{{\mathbf{i}}}{\mathbf{+}}{{\mathbf{U}}}_{{\mathbf{i}}}{\mathbf{+}}{{\mathbf{W}}}_{{\mathbf{NC}}}{\mathbf{=}}{{\mathbf{K}}}_{{\mathbf{f}}}{\mathbf{+}}{{\mathbf{U}}}_{{\mathbf{f}}}}$

###### Problem Details

Two meteoroids are heading for earth. Their speeds as they cross the moon's orbit are 2.0 km/s.

A) The first meteoroid is heading straight for earth. What is its speed of impact?

(B) The second misses the earth by 4500 km. What is its speed at its closest point?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Intro to Conservation of Energy concept. You can view video lessons to learn Intro to Conservation of Energy. Or if you need more Intro to Conservation of Energy practice, you can also practice Intro to Conservation of Energy practice problems.