| http://www.w3.org/ns/prov#value | - Force and mass ??? ??? ??? What are two types of friction? static and sliding ??? ??? ??? What are two things that friction depends on? type of surface and the force pressing the two surfaces together ??? ??? ??? You push yourself on a skateboard with a force of 30 N and accelerate at 0.5m/s2.
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