QUARTER 2

• A body rotating about an axis is said to have Rotational kinetic Energy
• Rotational motion motion of a body that rotates; that is, all points in the body move in circles
• Centers of these circles all lie on a line called axis of rotation
• Rigid body a body with definite shape that doesnt change, so that the particles composing it stay in fixed position relative to one another.
• The resistance of a body to rotate is called moment of inertia or rotational inertia
• Moment of inertia is a measure of an objects resistance to changes in its rotation speed determined by the distribution of its mass relative to the axis of rotation
• Keplers 1 Law (law of orbits) "The path of any object in an orbit follows the shape of an ellipse, with the orbited body at one of the foci.
• Keplers 2 law (law of areas) " An imaginary line from the sun to the planet sweeps out equal areas in equal times, planets dont move at constant speed"
• Keplers 3 (Law of Periods) " The square of the period of orbit, divided by the cube of the radius of the orbit, is equal to a constant K for thay one object being orbited."