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22 October, 00:05

1) Which of the following explains why a bicycle uses a gear?

A.) The gear increases the effort force needed.

B.) The gear increases resistance force.

C.) The gear decreases effort force.

D.) The gear decreases resistance force.

2) Which of the following is a compound machine?

A.) a screw being screwed into a piece of wood

B.) a can opener

C.) a crowbar

D.) a wheel and axle

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Answers (1)
  1. 22 October, 03:03
    0
    1. "The gear decreases effort force" is the one among the following choices given in the question that explains why a bicycle uses a gear. The correct option among all the options is option "C".

    2. A can opener is a compound machine. The correct option among all the options that are given in the question is the second option or option "B".
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Home » Physics » 1) Which of the following explains why a bicycle uses a gear? A.) The gear increases the effort force needed. B.) The gear increases resistance force. C.) The gear decreases effort force. D.) The gear decreases resistance force.
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