40. A construction worker wants to lift a heavy steel bar to the top of the building. Which machine would
help him to do the job efficiently?
A. fixed pulley
B. lever
C. wheel and axle D. Wedge
41. Which of the simple machines below is a double inclined plane used for cutting wood?
C. needle
D. crowbar
42. Which machine reduces friction?
A. wedge
B. lever C. inclined plane D. Screw
43. A can of biscuit is usually opened with a spoon. What kind of simple machine is the spoon?
A. wedge B. lever C. inclined plane D. wheel and axel
44. Mang Emong bought a cow. How could he make the cow go up to the truck?
A. a wedge
B. a lever
C. an inclined plane D. a screw
45. Calesa can pull faster than a sledge, why?
A. Calesa is pulled by a horse. C. Sledge is pulled by a carabao.
B. Calesa is run by a machine.
D. Calesa has wheel and axle.​