Across
- 4. the rate at which velocity changes with time; the change in velocity may be in magnitude or direction or both, and it is usually measured in units of m/s2.
- 6. Simply stated, a push or a pull.
- 10. The unit of mass. One kilogram (kg) is the mass of 1 liter (L) of water at 4°C.
- 11. The speed of an object and specification of its direction of motion.
- 13. The property by which objects resist changes in motion.
- 14. The quantity of matter in an object. More specifically, a measure of the inertia (or sluggishness) that an object exhibits in response to any effort made to start it, stop it, deflect it, or change in any way its state of motion.
- 15. The scientific unit of force.
- 16. The acceleration produced by a net force on an object is directly proportional to the net force, is in the same direction as the net force, and is inversely proportional to the mass of the object.
- 19. A quantity whose description requires both magnitude and direction.
- 21. The vector sum of forces acting on an object that is not accelerating equals zero: ΣF = 0.
- 22. Distance traveled per unit time.
- 24. Terminal speed in a given direction (often downward
- 28. The action force and the reaction force that occur in an interaction.
- 29. The speed at which the acceleration of a fall-ing object terminates when air resistance balances its weight.
- 30. Motion under the influence of gravitational pull only.
Down
- 1. Every object continues in a state of rest, or in a state of motion in a straight line at constant speed, unless acted upon by a net force.
- 2. Energy cannot be created or destroyed; it may be transformed from one form into another, but the total amount of energy never changes.
- 3. The work output of any machine cannot exceed the work input. In an ideal machine, where no energy is transformed into thermal energy,
- 5. Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first object.
- 7. The force of friction acting on an object due to its motion in air.
- 8. The quantity of space an object occupies
- 9. The resistive force that opposes the motion or attempted motion of an object past another object with which it is in contact, or through a fluid.
- 12. Falling under the influence of gravity alone—falling without air resistance.
- 17. The force upon an object due to gravity. More spe-cifically, the force with which a body presses against a supporting surface.
- 18. The force that supports an object against gravity, often called the normal force.
- 20. An arrow that represents the magnitude and direc-tion of a quantity.
- 23. the combination of all forces that act on an object.
- 25. Mutual action between objects during which each object exerts an equal and opposite force on the other.
- 26. The percentage of the work put into a machine that is converted into useful work output.
- 27. The time that one’s feet are off the ground dur-ing a vertical jump.