A 160 lb person has a mass of 160/32 = 5 slugs. A 160 lb person steps into an elevator and stands on a bathroom scale. Determine the scale reading for the given scenarios. The elevator accelerates upwards and is now moving at a constant speed
a. 150 lb c. 170 lb
b. 160 lb d. none of the above
B
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Energy Conservation With Conservative Forces: A frictionless simple pendulum, with a small but dense 4.4-kg mass at the end and a length of 75 cm, is released from rest at an angle of 50° with the vertical.(a) To what height above its lowest point does the mass swing on the other side?(b) What is the speed of the mass at the bottom of the swing?
What will be an ideal response?
An object is moving very fast perpendicularly to your line of sight. What shift will you observe in its spectrum?
A. no shift B. red shift C. yellow shift D. blue shift
Wind blowing over the top of a hill
A) increases atmospheric pressure there. B) decreases atmospheric pressure there. C) does not affect atmospheric pressure there.
Which of the following is a unit-vector?
A) ( - o)/t B) /x C) v cos ? D) o + t E) sin2? + cos2?