A student gradually increases the horizontal pull on a 2kg block resting on a table. The measured frictional force rises linearly with the pull until the pull reaches 5N, after which the frictional force suddenly drops to 4N and then remains almost constant.
Answer the following:
a. (i) Which range of the applied pull corresponds to static friction and which range corresponds to kinetic friction?
b. (ii) State the numerical values of the limiting friction and the kinetic friction acting on the block.