11. If there were no force, what might act on an object to make it move? A. energy B. friction C. gravity D. machine 12. The energy produced by a vibrating objects. A. chemical energy B. electrical energy C. mechanical energy D. sound energy 13. The energy that comes from the flow of electrons from one material to another is? A. chemical energy B. electrical energy C. mechanical energy D. sound energy 14. The energy of moving body or a body capable of producing motion is? A. chemical energy B. light energy C. mechanical energy D. nuclear energy 15. What energy is stored in a dry cell? A. chemical energy D. nuclear energy B. light energy C. mechanical energy 16. Which energy allows radio, TV, computers, washing machine to function? A. chemical energy B. electrical energy C. mechanical energy D. sound energy 17. What form of energy is produced when the strings of a guitar are plucked? A. mechanical B. radiant C. electrical D. Sound 18. How energy is transformed in a speaker? A. electrical to sound B. sound to electrical C. sound to heat D. heat to light 19. What is always produced when energy transformation occurs? A. electricity B. heat C. light D. sound 20. Which device uses chemical energy in portable radios to produced sound? A. dry cell B. generator C. flashlight D. motor 21. Which simple machine is made of rigid or strong bar that is free to move at a fixed point? A. lever B. pulley C. wedge D. wheel and axle 22. Which simple machine is used to reduce friction and allow moving of object using lesser force? A lever B. pulley C. wedge D. wheel and axle 23.Knives, nails, chisels, and needles are examples of what kind of simple machine? A. pulley B. lever C. wedge D. wheel and axle 24. Seesaw, Scissors, pliers are examples of which kind of lever as illustrated below? A. first class lever B. second class lever C. third class lever D. fourth class lever 25. The amount of force needed to lift or move the load depends on the distance between fulcrum and the load. How much force needed to lift the load as shown in the illustration below? A. lesser force B. greater force C. equal to the weight of load. D. amount of force cannot be identified 26. Which does not describe a movable pulley? A. It moves along with the rope or load B. The direction of the force does not change C. The wheel of this pulley is firmly attached to a fixed point. D. It decreases the distance but increases the force needed to exert. 27. Elevator as to pulley while escalator as to: C. lever B. screw D. inclined plane A. wedge 28. Which simple machine is described as an inclined plane wrapped around a shaft, creating grooves? C. Screw D. wheel and axle A. lever B. pulley 29. Which simple machine is used by the man to move the barrel as shown in the picture below? A. wedge B. screw C. lever D. inclined plane 30. Which is not a function of a simple machines? A. Help to do daily task easier and faster. B. Change the direction of the force to move objects into different directions. C. Decrease the distance and speed of the force to move objects farther and faster. D. Increase the amount of force to lift heavy objects or by exerting greater force on an object more than what can apply.
