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ps150_public_final

# ps150_public_final - Sample Final questions for PS 150 1...

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Sample Final questions for PS 150 1) Which of the following is an accurate statement? A) Rotating a vector about an axis passing through the tip of the vector does not change the vector. B) The magnitude of a vector can be zero even though one of its components is not zero. C) The magnitude of a vector is independent of the orientation of the coordinate system used. D) It is possible to add a scalar quantity to a vector. E) Even though two vectors have unequal magnitudes, it is possible that their vector sum is zero. 2) Two vectors are given as follows: ˆ ˆ ˆ 3 2 2 A i j k ± ± r and ˆ ˆ ˆ 2 5 2 B i j k ± ± ² r . The scalar product A B r r is closest to A) -20 B) -12 C) zero D) 8 E) 12 3) A ball is projected upward at time t = 0.0 s, from a point on a roof 30 m above the ground. The ball rises, then falls and strikes the ground. The initial velocity of the ball is 32.5 m/s. Consider all quantities as positive in the upward direction. At time t = 2.1 s, the acceleration of the ball is closest to: A) -5 m/ B) -10 m/ C) zero D) +10 m/ E) +5 m/ 4) A test rocket is fired straight up from rest with a net acceleration of 20 m/s 2 . After 4 seconds the motor turns off, but the rocket continues to coast upward. What maximum elevation does the rocket reach? 5) A package is dropped from an airplane traveling horizontally at constant speed. Friction is negligible. One second later a second package is dropped. Which of the following is an accurate statement?

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ps150_public_final - Sample Final questions for PS 150 1...

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