Kinetic friction (also referred to as dynamic friction) is the force that resists the relative movement of the surfaces once they're in motion.
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Static and kinetic friction example (video) | Khan Academy
Answer a would be static friction
Answer b is fluid friction
(Air resistance is fluid friction. Fluid friction is the friction experienced by objects which are moving in a fluid and the air is a fluid.)
Answer c is static friction
ANSWER D IS KINETIC FRICTION
Hope this helps :D
The moving charges are electrons bouncing from atom to atom.
Answer:
I just want the points but you should pay attention in class jk
Answer:
F=ma
F=10(mass of object 2-0.2)
F=ma
=0.2×4.9
=0.98N
10x-2=0.98(assume that mass of second object is X)
10x =0.98+2
10x=2.98
X=0.298kg
the mass of second object=298g
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