Consider a heavy object which is thrown straight up, reaches its highest point, and then falls back down to the ground. During what parts of the trajectory was it in "FREE FALL"? (assume here that air friction is negligible)
What will be an ideal response?
During its entire travel during which gravity was the only significant influence on it (it "freely fell" moving up, moving down, and at its motionless highest point).
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Explain why "the dark side of the Moon" is an incorrect statement
What will be an ideal response?
Rotational Dynamics: A 1.53-kg bucket hangs on a rope wrapped around a pulley of mass 7.07 kg and radius 66 cm. This pulley is frictionless in its axle, and has the shape of a solid uniform disk. After the bucket has been released, (a) what is the angular acceleration of the pulley, and (b) what is the acceleration of the bucket?
What will be an ideal response?
Astronomers infer that the universe is expanding because distant galaxies all appear to
A) be growing in size. B) be moving away from us, with more distant ones moving faster. C) be made mostly of dark matter. D) rotate rapidly.
Which of the following molecules is polar?
A) a B) b C) c D) All are polar. E) Only A and C are polar.