Unit 3 Work Review: Question Preview (ID: 4572)

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The SI unit of power is
a) watts b) joules c) N/m d) m/s/s
The end of a lever that you push down is the
a) output force b) output distance c) input force d) fulcrum
Which below is NOT a simple machine?
a) wheel & axle b) inclined plane c) pulley d) fulcrum
Which below is NOT an example of work being done?
a) pushing a shopping cart in a store down an aisle b) pulling a sled behind you in the snow c) pushing your kid brother on a swing d) holding a trophy above your head
Which below does the MOST work
a) pushing a 20 N box 5 meters b) pulling a 40 N chair 1 meter c) carrying a 20 N purse 200 meters d) pushing with 200 N of force on a wall that doesn't move
You set up a block and tackle pulley system that supports a 200 N weight and consists of 2 pulleys with 3 rope sections supporting the weight. The IMA of the pulley is
a) 0 b) 2 c) 3 d) 200
You push a box 15 meters in 4 seconds using 25 N of force. The power exerted is
a) 375 W b) 93.8 W c) 4 W d) 1500 W
1 kilowatt = ?
a) 746 W b) 1 horsepower c) 1,000 W d) 1,000,000 W
A machine with an AMA of 6 ...
a) Has an input distance of 6 cm and an output of 12 cm b) Increases your input force by 6 times c) Is a lever with no fulcrum d) Has a smaller output force than input force
The person who coined the term
a) Alexander Graham Bell b) Sir Isaac Newton c) Galileo d) James Watt
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