Physics

3. the quantity of matter in a substance,measured in kilograms
7. the force between opposes one sliding on the other
11. a collision that conserves initial kinetic energy
14. a reaction force that pushes a body forward in response to a backward force
18. the acceleration of an object moving in a circle, toward the center
19. the only force acting on an object is the force due to gravity
20. the pulling force that acts along a stretched flexible connector
22. ratio of force to area
23. electromagnetic waves with wavelength in the range
24. the ability to do work
25. turning or twisting effectiveness of a force

1. the motion of an object to a circular path at constant speed
2. a body at rest , will remain at rest
4. change in length to an original length
5. the rate at what objects velocity changes over a period of time
6. there’s always an equal and opposite reaction
8. a collision in which internal kinetic energy is not conserved
9. change in shape due to application of force
10. the number of complete wave cycles passing a a given point within one second
12. the transfer of energy by a force that causes an object to be displaced
13. force to be equal in change of momentum
15. The difference between the final and initial momentum
16. movement back and forth at regular speed
17. a sketch showing all the external forces acting on an object or system
21. defined by boundaries of an object or collection of objects being observed