Suppose that a block of mass 2 kg is pulled to the right with a force of 10 n, and the friction force on the block is directed to the left with a magnitude of 4 n. determine the acceleration of the block.

The block has an acceleration of

Explanation:

By means of Newton's second law it can be determine the acceleration of the block.

  (1)

Where represents the net force, m is the mass and a is the acceleration.

 (2)

The forces present in x are and (the friction force):

Notice that subtracts to since it is at the opposite direction.

The forces present in y balance each other:

Therefore:

 (3)

But and writing (3) in terms of a it is get:

So the block has an acceleration of .

32: from largest to smallest, this hierarchy includes eons, eras, periods, epochs, and ages.

33: answer is c

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explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."