Across
- 1. The rate of change in the velocity of an object. In mathematical terms, acceleration equals change in velocity divided by change in time.
- 3. Forces that act on a single object and are not canceled out. Unbalanced forces produce a net force that is not zero.
- 4. A push or pull.
- 5. Forces that act on a single object and are canceled out. Balanced forces produce a net force that is zero.
- 9. One of the four fundamental forces of nature. Gravitational force is the attractive force between two objects due to their masses. Gravitational force is also called the force of gravity or simply gravity.
- 10. A quantity that has a magnitude but no direction.
- 13. One of the four fundamental forces of nature. The strong nuclear force holds together the positively charged and neutral particles in the nucleus of the atom.
- 16. The force of attraction or repulsion that results from interactions between objects with magnetic fields or from the motion of electrically charged particles.
- 17. The force of the attraction or repulsion that results from interactions between electrically charged particles. Electric force is also called electrostatic force.
- 19. The amount of matter in an object.
- 20. The four basic types of interactions between particles or objects. The fundamental forces are responsible for the way that matter behaves in the universe.
- 21. The distance an object travels during a specific period of time. Speed is the rate of motion.
- 22. The overall force (vector sum of all forces) acting on an object.
- 24. A change over time in the position of an object with respect to a reference point.
- 26. A property of matter that can be either positive or negative and that causes particles to experience an attractive force when near a particle of opposite charge or a repulsive force when near a particle of the same charge.
- 27. The area around a charged object in which its electric force acts on other charged objects.
- 28. The scientific law that states that when one object exerts a force on a second object, the second object exerts a force back on the first that is equal to, and in the opposite direction from, the original force.
Down
- 2. One of the four fundamental forces of nature. Electromagnetic force is the force produced by interactions between electrically charged or magnetic objects.
- 6. A quantity that has both a magnitude and a direction.
- 7. The scientific law that states that the force applied to an object equals the object's mass multiplied by the object's acceleration. Force = mass × acceleration.
- 8. A force exerted on one object by another object.
- 11. A force that acts on objects that do not touch.
- 12. One of the four fundamental forces of nature. The weak nuclear force acts between particles of the atom and causes instability in the nucleus, leading to radioactive decay.
- 14. The area around a magnetic object in which magnetic forces exist and act on matter with magnetic or electric properties.
- 15. The force exerted by a solid surface that is in contact with an object that applies a force to the surface. It acts in the direction opposite that of the applied force.
- 18. The size of a quantity without regard to sign or direction.
- 23. The rate at which a moving object's position changes with respect to distance and direction. Velocity is the measure of how displacement changes with time.
- 25. The scientific law that states that an object in motion tends to stay in motion and that an object at rest tends to stay at rest.