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...................... is the resistance force originated between the object in motion and the medium touching it
Friction force
Heart muscle contraction and relaxation helps the heart to .............................
pump the blood all over the body organs
Liquids transport through pores and the walls of cells from .................. concentration to the ................ one.
lower , higher
Asphalt is more rough in curved roads to ................ friction force.
increase
Mention one benefit of friction force.
It helps to stop and start car motion
