A brick slides on a horizontal surface. Which of the following will increase the

Question

A brick slides on a horizontal surface. Which of the following will increase the frictional force on it? Increasing the surface area of contact Putting a second brick on top Decreasing the surface area of contact Decreasing the mass of the brick None of these will change the frictional force Regarding Newton's 3,d law: The "reaction force" does not cancel the ''action" force because the action force is greater than the reaction force they are in the same direction they act on different objects the reaction force is greater than the action force the reaction force only appears after the action force disappears

Explanation / Answer

7) by putting a second brick on top will increase the frictional force on brick

so answer is B

8)reaction force does not cancel the action force ,because both of these forces act on different objects

so answer is C

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