Suppose you are in a spaceship accelerating away from Earth at 9.8 m/ s2 (1 g), so that you can walk on the floor of your spaceship as though experiencing normal gravity on Earth
Is it possible for you to consider yourself to be at rest? Why or why not? A) No, because you feel a force so you must truly be accelerating.
B) No, because you are accelerating away from Earth, and it's not legitimate to claim that Earth is accelerating away from you.
C) Yes, by assuming you are feeling effects of gravity and that Earth is accelerating away from you because it is in freefall.
D) Yes, but only if believe that you are the center of the universe.
C
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Force on a Wire: A thin copper rod 1.0 m long has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to balance the weight of the rod?
A. 1.2 A B. 2.5 A C. 4.9 A D. 9.8 A
A 20.0 kg box slides down a 12.0 m long incline at an angle of 30.0 degrees with the horizontal. A force of 50.0 N is applied to the box in the upward direction. The applied force F makes an angle of 0.00 to the incline. If the incline has a coefficient of kinetic friction of 0.000, then the increase in the kinetic energy of the box is
A. 620 J. B. 576 J. C. 542 J. D. 500 J. E. 475 J.
The two Voyager spacecraft carry a message from Earth, just in case an alien civilization ever runs across them
Indicate whether the statement is true or false
Which of the following ions is not isoelectronic with the other three?
a. Cl- b. K+ c. Br- d. P3-