1)Introduction

=Snowline 2= media type="custom" key="3874079" = = So what did you observe in the game? Here are the things I observed
 * Before we start on any serious work, let's play a roller-coaster related game!
 * The starting point of the roller coaster is higher than the ending point
 * The upward slopes cannot be too steep

Curious to know why this is so? Let's explain how the roller coaster works with physics!

= = = = = Introduction  = = = __Energy __ __Work__ __Power__
 * Energy is derived from the greed word ἐ νέργεια, or energeia, which means activity or operation.
 * It is a scalar quantity
 * It describes the amount of work done by a force (capacity to do work)
 * SI unit: Joule
 * Work done= Constant Force (N) x Distance moved in direction of force (m)
 * SI unit- joules (J)
 * Note that the distance moved must be in the direction of the force (carrying a 10kg backpack and walking 20km does not count as doing work in physics)
 * Note that there must be distance moved (you can use all your strength to push against a wall, but if it does not move, no work is done)
 * Rate at which work is being done
 * Calculated by P=W/t
 * <span style="font-family: Arial, Helvetica, sans-serif;">SI unit - watt (=1 joule/second)