Why is it Harder to Walk Uphill?

Sat, 25 Nov 2000 01:07:23 +0000

Raju heard the familiar cry of the ice-cream seller reach his ears, clear as a bell, even from his fourth floor apartment. He flew out of the flat and bounded down the stairs four steps at a time. The lift being under temporary repair, he had to take the stairs. He arrived downstairs a little breathless, and extremely impatient to have his ice-cream.

How do Satellites Stay Up?

Thu, 24 Apr 2003 16:34:46 +0000

Satellites orbit the earth because of the force of gravity. To understand why this happens and why the satellite does not get pulled in and fall, we have to understand what forces do. A force will change the motion of an object; it might speed it up, slow it down or change its direction. For example, if you are running and someone pushes you from behind, you speed up (the force is in the direction of your motion). But if someone pushes you in the chest when you are running, you slow down (the force is in the opposite direction to your motion). If you are running and someone pushes you from the side, you move away from them, changing your direction. (the force is at right angles to the motion). This idea is called

Gravity on Pitara Kids Network

Why is it Harder to Walk Uphill?

How do Satellites Stay Up?