Figure 5-22 shows overhead views of four situations in

Chapter , Problem 5

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QUESTION:

Figure 5-22 shows overhead views of four situations in which forces act on a block that lies on a frictionless floor. If the force magnitudes are chosen properly, in which situations is it possible that the block is (a) stationary and (b) moving with a constant velocity?

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QUESTION:

Figure 5-22 shows overhead views of four situations in which forces act on a block that lies on a frictionless floor. If the force magnitudes are chosen properly, in which situations is it possible that the block is (a) stationary and (b) moving with a constant velocity?

ANSWER:

Step 1 of 4

For, the constant velocity or remaining stationary of an object is possible when the net force on the object is zero.

The Free-body-diagram of the forces in the first case is shown below:

                    Nb4.JPG

The force  is balance by the force  but there is a net vertical force.

The net force on the block is not zero here, so there is a net acceleration.

 

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