Vocabulary
force, motion, push pull, valve, gravity, net force, balance, speed, imbalance, 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, speed, energy, mechanical energy, kinetic energy, motion, force, force, motion, static, gravity, net force, friction, gravitational pull, motion, force, push, pull, strength, direction, strong, weak, gravity, past motion, future motion, pattern, observed, measured, force, movement, gravity, direction, pull, net force, balanced forces, push, unbalanced forces, intensity, speed, velocity, lift (upward force), force, energy, motion, direction, contact force, magnet, friction