Description: Centripetal force keeps objects moving in a circular path. Kepler's laws describe planetary motion. Newton's law of universal gravitation governs attraction between masses.
Description: G is universal gravitational constant because it applies universally. Center of mass is balance point in an object. Moon's gravity causes tides.
Description: Free fall is motion under gravity without air resistance. Mass is amount of matter, weight is force due to gravity.
Description: Numericals Based on Mass & Weight.
Description: Kepler's laws provided insight into planetary motion, guiding Newton to develop the inverse square law and calculate escape velocity.
Description: Conservation of energy: Energy persists; escape velocity: speed to overcome gravitational pull.