Vocabulary
gravity, mass, gravitational field, force, mass, distance, gravity, mass, gravitational field, force, mass, distance, gravity, attract, mass, force, applied forces, contact force, non-contact force, distance, motion, strength, direction, push, pull, collide, collision, impulse, gravitational force, magnetic force, friction, position, orbit, Gravity, force, direction, strength, contact force, non-contact force, orbit, sphere, , , forces, sum of forces, speed, forces, applied force, speed, forces, sum of forces, applied force, friction force, speed, friction, spring constant, natural length, equilibrium position, equilibrium, displacement, spring constant, natural length, equilibrium position, equilibrium, displacement, spring constant, natural length, equilibrium position, equilibrium, displacement, oscillation, period, velocity, acceleration, gravity, spring constant, natural length, equilibrium position, equilibrium, displacement, oscillation, period, gravity, non-contact force