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name the six types of simple machines and their uses
inclined plane, lever, wedge, screw, pulley, & wheel and axle
How is friction helpful?
It can prevent slipping on a smooth surface, used to brake(stop), a bike, and can be used to start a fire.
How is friction problematic?
Too much friction makes heavy objects hard to move. Friction can cause things to wear away. For example, the soles of your shoes can wear away if you run/walk alot.
Why would someone go up a curved path rather than a straight steep path?
It would take more effort and energy to go up a steep path than to walk side to side on a curved path.
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