Learning Power to an object Gravity Frictional force Vertical drag Pressure The movement of the object The movement of the speed to change The movement and power Game Blanks game Falling ball game Panel Question Tug of war game Shuffle game Look for a tag Quiz Quiz 1 Quiz 2 Site map Site map

Gravity An object on the earth says the power that the earth is going to draw out toward the center with gravity like the left figure. The gravity acts in not only the face of the Earth but also the places such as months.   Only as for Newton A unit of the size of the power needs business with Newton (sign N). 1N is approximately equal in 100g with size of the gravity to act on the earth. As for the size of the power, only Newton such as the left is employed.   An arrow of three power Power has an arrow of three power. At first the first expresses a direction of the power, the direction authority.The second expresses it by size of the power, the length of the arrow.The third is a point to act, the point that a string touches a hand with of the power.