Question

a student is writing a formal laboratory report for her physics class about simple machines. read the draft of the report and answer the question that follows. the six simple machines are the inclined plane, the wedge, the screw, the lever, the pulley, and the wheel and axle. first, the inclined plane consists of a flat piece of material that is higher at one end than the other. it is used in daily life primarily to move heavy objects. when moving an object from a lower location to a higher one, sliding it up an inclined plane is easier than attempting to lift it straight up. many times, inclined planes can also be used to move things from a higher location to a lower one. again, sliding it down is easier than lifting it and attempting to bend down to place it in a lower location. second, the wedge is a simple machine that consists of two inclined planes placed back - to - back. together, the two inclined planes create a machine that has a point with a sharp edge. many times, wedges are used to cut or slice other objects. wedges are useful. which of the following sentences could be added after the underlined sentence in the second paragraph and still maintain the formal and objective tone of the report? a some familiar wedges are knives, saws, and door stoppers. b boats are wedges too, and that is pretty interesting, right? c another simple machine is the screw.

Explanation:

The text is about simple machines in a physics - related context. We need to find a sentence that maintains a formal and objective tone. Option A lists common examples of wedges in a neutral way. Option B has an informal tone with "pretty interesting". Option C just states another simple machine but doesn't add to the description of wedges like Option A does.

Answer:

A. Some familiar wedges are knives, saws, and door stoppers.