If you push with 200 N of force against your 1500-N refrigerator and it slides across your kitchen floor at constant velocity, friction of the floor against the refrigerator must be
1) zero,
2) 200 N,
3) 1300 N,
4) 1500 N,
5) greater than 1500 N,
and the force with which you push must be
6) equal and oppositely directed to the friction force.
7) the action force, and the friction the reaction force.
8) both of these.
9) none of these.
Question 2
While a ship moves toward the right at constant velocity, a seaman atop the mast drops a stone which freely falls to position
1) A.
2) B.
3) C.
This is better understood by realizing that
4) the ship moved to the right a distance equal to that between A and B while the stone fell vertically.
5) the stone was moving to the right just as fast as the ship during the fall.
6) the net force acting on the stone is equal to its weight.
7) because of inertia, the stone experiences a horizontal motion unlike that of the ship.
8) the stone underwent an acceleration while the ship did not.
Injecting an IV push (bolus) medication; B, into a primary infusion line
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Thumb slides to Achilles tendon.