Across
- 2. a single force whose external effects on a rigid body are the same as the effects of several actual forces acting on the body
- 5. the change in position of an object
- 12. Inertia is the tendency of an object to resist being moved or, if the object is moving, to resist a change in speed or direction.
- 13. a physical quantity that has both magnitude and direction
- 14. a system including x axes and y axes
- 15. the total displacement divided by the time interval during which the displacement occurred
- 16. the projections of a vector along the axes
- 19. the longest side of a right triangle
- 20. 1cm=20 000m is a ____ can be used on a map.
- 21. represented by Fg
Down
- 1. the resistance encountered when one body is moved in contact with another
- 3. which shows only the forces acting on the object of interest
- 4. a motion which is in a parabola curve
- 6. the state in which the net force on an object is zero
- 7. F=ma
- 8. a physical quantity that has magnitude but no direction
- 9. An object at rest remains at rest, and an object in motion continues in motion with constant velocity (that is, constant speed in a straight line) unless the object experiences a net external force
- 10. a force perpendicular to the contact surface
- 11. a vector that represents the sum of two or more vectors
- 17. a measure of inertia
- 18. an action exerted on an object which may change the object’s state of rest or motion