Across
- 2. Two or more forces can be combined and represented by a single ... force.
- 5. In ... collision, some kinetic energy is converted to heat and sound.
- 6. a device used to measure time
- 9. ... is the part of physics that deals with motion, force and energy.
- 11. a diagram to show the relationship between total input energy, useful output energy and wasted energy.
- 12. Newton's third law states that to every action, there is an equal but ... reaction.
- 15. Passenger cars have collapsible front and rear sections to reduce the force of ... in a collision.
- 18. Newton's first law states that a body remains in its state of rest or uniform motion unless it is acted on by an ... force.
- 21. If there is no ... resistance, a coin and a feather will fall at the same rate.
- 22. ... is the rate of work done.
- 25. Wind and tide are ... energy sources.
- 26. ... is the product of force and moment arm.
- 27. A ... uses sound waves for underwater ranging and detection.
Down
- 1. SI unit of length
- 3. The condition of equilibrium for rotational motion is that the sum of clockwise moments about any point is equal to the sum of ... moments about that point.
- 4. ... energy comes from the heat under the crust of the Earth
- 7. Newton's second law states that the ... force acting on a object is equal to the product of its mass and acceleration.
- 8. A moving object has ... energy.
- 10. SI unit of time
- 13. A body is in ... if it is at rest or in uniform motion.
- 14. Fish has ...-lined bodies to reduce friction in swimming
- 16. the short form of millisecond
- 17. unit of pressure
- 19. ... is the ability to do work.
- 20. A ... quantity has magnitude and direction.
- 23. the short form of potential energy
- 24. SI unit of force