Across
- 3. the tendency of something to stay in rest or motion
- 4. A force caused by a rubbing motion between two objects.
- 5. Also known as a gravitational force. Is equal to the force exerted on an object by the Earth's gravity at sea level.
- 12. a body remains at rest or in motion with a constant velocity unless acted upon by an external force
- 14. the product of a body's mass and its velocity
- 15. the continuum of experience in which events pass to the past
- 16. How quickly an object speeds up, slows down or changes direction. Is equal to change in velocity divided by time
- 18. How fast an object moves. Is equal to the distance that object travels divided by the time it takes.
- 19. action and reaction are equal and opposite
- 20. the energy stored by an object ready to be used. (In this lesson, we use gravitational potential energy, which is directly related to the height of an object and its mass.)
Down
- 1. the rate of change of momentum is proportional to the imposed force and goes in the direction of the force
- 2. The speed needed at the top of a loop for a car to make it through the loop without falling off the track.
- 6. A force that draws any two objects toward one another.
- 7. The energy of an object in motion, which is directly related to its velocity and its mass. Mechanical Energy= Kinetic = Potential Energy
- 8. Any push or pull
- 9. a twisting force
- 10. an amusement park attraction that consists of a light railroad track with many tight turns and steep slopes, on which people ride in small fast open cars.
- 11. A combination of speed and the direction in which an object travels.
- 13. the time a pilot or or aircraft spends in flight.
- 17. a quantity that has magnitude and direction