Simple Machines
Across
- 4. 'Rolls' to reduce friction
- 8. He came up with three laws of motion
- 10. A machine made of two wedges on levers (used to cut things)
- 13. The force pulling us down due to the mass of the Earth
- 14. More commonly known as a ramp
- 15. Strong shape with circular cross section
- 17. Most simple machines decrease the force by increasing the _________ travelled
- 18. Two inclined planed back to back
Down
- 1. By pulling rope through these we can decrease the force needed for a job
- 2. Strong shape used in roof trusses and bridges
- 3. For every force there is an equal but _______ force
- 5. The tendency of an object to 'keep doing what its doing'
- 6. How quickly an object changes velocity (speed)
- 7. This equals mass x acceleration (F=ma)
- 9. Changes the direction of a force
- 11. An inclined plane wrapped around an axle
- 12. An object will keep doing what its doing unless acted on by an _________ force
- 16. A long handle allowing force to be applied at a distance