Land surfaces change, erosion happens, the ground collapses, etc.
<u>P</u><u>e</u><u>r</u><u>s</u><u>o</u><u>n</u><u>-</u><u>1</u>
- Initial velocity=u=0m/s
- Final velocity=v=10m/s
- Time=10s=t




<u>P</u><u>e</u><u>r</u><u>s</u><u>o</u><u>n</u><u>-</u><u>2</u>
- initial velocity=0m/s=u
- Final velocity=v=0.25m/s
- Time=t=2s



Person-1 is accelerating faster.
A. <span>Standing is health-enhancing because it uses energy.
Because standing can burn a lot of calories.</span>
Three things that effect a life system would be
- sunlight
-water
-energy/food
Hope this helps