Simple Machines
Flashcard
•
Science
•
7th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
Requirement for work to be done: Force is exerted, Object is carried, Force moves an object, Machine is used.
Back
Force moves an object.
2.
FLASHCARD QUESTION
Front
Calculate the work done when a painter lifts a can of paint weighing 48 Newtons a distance of 3 meters. (work = distance x force)
Back
48N × 3m
3.
FLASHCARD QUESTION
Front
Example of how a simple machine changes the direction of a force: using a rope to pull a box up a hill, using a rope and pulley to raise a flag, using a slide to push a box down steps, using an axle and wheel to make a wagon move forward.
Back
using a rope and pulley to raise a flag
4.
FLASHCARD QUESTION
Front
What causes the efficiency of a machine to be less than 100%? Options: friction, gravity, input force, reaction force
Back
friction
5.
FLASHCARD QUESTION
Front
Which is a simple machine? Options: baseball bat, bicycle, can opener, car
Back
baseball bat
6.
FLASHCARD QUESTION
Front
Which of the following is a form of the inclined plane? Options: pulley, screw, wheel and axle, lever
Back
screw
7.
FLASHCARD QUESTION
Front
Which simple machine would most likely increase the distance and reduce the force needed for a rolling cart to be moved up three steps? Options: lever, screw, pulley, inclined plane
Back
inclined plane
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