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Work and Force
7th grade Work and Force
Question | Answer |
---|---|
Lever | A rigid object that uses a pivot point or fulcrum to increase the output force |
Work | Movement of an object over a distance when a force is applied to the object |
Screw | An inclined plane wrapped around a cylinder |
Effort | A force applied to a simple machine to do work |
Wheel & Axle | A simple machine made of a shaft or axle, inserted through the middle of a wheel so that the wheel rotates on the shaft |
Simple machine | A device that transfers force to make work easier |
Inclined plane | A simple machine made of a flat surface with one end higher than the opposite end. |
Mechanical advantage | The ratio of the output force to the input foce in a simple machine |
Pulley | A wheel that rotates around a fixed axle and has a rope or chain/cable that wraps around it |
Friction | A force between 2 objects in contact with each other that opposes motion |
Load | the resulting force when effort is applied to a simple machine that opposes motion |
Wedge | an inclined plane that moves |
Unbalanced force | Force that acts on an object that causes the motion of the object to change |
Force | A push or pull on an object |
Balanced force | A force that acts on an object that causes no change in the objects motion |
Tugor pressure | The pressure or force used by a seed to sprout out of its shell or the ground. |
Geotropism | The movement of plants to grow towards the sun opposing gravity |