Physics

2. fall when the only force acted on an object is gravity
5. second law the acceleration of an object depends on the mass of the object and the amount of force applied
7. plains a flat surface which has a slope
9. produced by reactions involving atomic or molecular changes
19. the amount of energy transferred or converted
20. point A place used for comparison to determine if something is in motion
21. a speed in any direction
22. the force between two rubbing surfaces
23. force equal force acting on an object in different directions
25. the entity as a source of nuclear energy
26. mechanical vibrations transmitted by an elastic medium
28. a stable elementary particle present in all atoms, orbiting the nucleus in numbers equal to the atomic number of the element in a neutral atom
30. force the overall force on an object
31. the capacity of a physical system to do work
32. quantity of matter
34. energy the mechanical energy that a body has by virtue its position
36. third law for every action there is an equal opposite reaction
37. a flow of electric charge through a conductor
38. a substance, body, or system that conducts electricity, heat, etc.

1. a linear interval of space
2. the number of times that a periodic function or vibration repeats itself in a specified time. Usually measured in hertz
3. the product of a body's mass and velocity
4. the rate in which the velocity changes
6. friction friction which keeps things still
8. the process by which masses of relatively warm air are raised into the atmosphere, often cooling and forming clouds, which compensatory downward movements of cooler air
10. the random thermal motion of atoms, molecules, clusters of atoms, et, in gases, liquids, and some solids
11. energy the mechanical energy that a body has by virtue of its motion
12. any device for converting mechanical energy into electrical energy by electromagnetic induction
13. velocity the maximum speed possible while free falling
14. push or pull on an object
15. the force that pulls objects towards each other
16. the state in which one objects distance from another is changing
17. a deviation in the direction of a wave at the edge of an obstacle in its path
18. force forces that produce a nonzero net force
24. constituting the core or central part
27. a measure of the compactness of a substance, expressed as its mass per unit volume
29. of conservation of energy the law that states that energy cannot be created nor destroyed but can be changed from one form to another
33. the distance an object travels per unit of time
35. an object in motion stays in motion