ASVAB Mechanical Comprehension Practice Test 233945
Block and Tackle
Two or more pulleys used together constitute a block and tackle which, unlike a fixed pulley, does impart mechanical advantage as a function of the number of pulleys that make up the arrangement. So, for example, a block and tackle with three pulleys would have a mechanical advantage of three.
Which of the following statements about this pulley configuration is false?
Mechanical advantage is the number of ropes that support the resistance |
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This is a block and tackle pulley configuration |
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Only multiplies the effort force |
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Changes the direction of and multiplies the effort force |