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Choose the correct words from the box to complete the paragraph below.
A is a straight bar that is used to push, pull, and lift things. It has three parts: the
or the point on which the lever tums: the
which is the weight lifted; and the
applied force that lifts the load. Levers are classified as first-, second-, and the third-class levers.
or
fulcrum
effort
lever
load
resistance
Choose the correct words from the box to complete the paragraph below.
A is a straight bar that is used to push, pull, and lift things. It has three parts: the
or the point on which the lever tums: the
which is the weight lifted; and the
applied force that lifts the load. Levers are classified as first-, second-, and the third-class levers.
or
fulcrum
effort
lever
load
resistance
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Answer:
Students are introduced to three of the six simple machines used by many engineers: lever, pulley, and wheel-and-axle. In general, engineers use the lever to magnify the force applied to an object, the pulley to lift heavy loads over a vertical path, and the wheel-and-axle to magnify the torque applied to an object. The mechanical advantage of these machines helps determine their ability to make work easier or make work faster.
This engineering curriculum aligns to Next Generation Science Standards (NGSS).