Across
- 4. The speed of an object in a particular direction.
- 5. The force with which an object’s mass is pulled toward the center of Earth.
- 7. The unit used to measure force. One newton is the force needed to accelerate a one-kilogram object at one meter per second squared: 1 N = 1 kg · m/s².
- 9. A push or pull that acts on an object.
- 11. The attractive force that acts between two masses.
- 14. A change in an object’s speed, direction, or both.
- 15. Resistance The force that air exerts on an object as it falls or moves through the air.
Down
- 1. A force that opposes the motion of objects that touch as they move past each other.
- 2. A state of equilibrium in which the forces acting on an object cancel each other out; also known as a zero resultant force.
- 3. The ratio of the distance an object moves to the amount of time it moves.
- 6. Velocity The point at which the force of air resistance acting on a falling object is equal to the force of gravity acting on it.
- 8. The quantity of motion an object has. Momentum is calculated by multiplying an object’s mass by its velocity.
- 10. The amount of matter in an object.
- 12. The tendency of an object to resist a change in its motion.
- 13. Field The area in which a force can be felt.