Free Fall: A 10-kg rock and a 20-kg rock are dropped at the same time and experience no significant air resistance. If the 10-kg rock falls with acceleration a, what is the acceleration of the 20-kg rock?
A. 4a
B. 2a
C. a
D. a/2
E. a/4
Answer: C
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If an object remains at rest, then the sum of both the external torques and the external forces on the object must be zero
A) True B) False
The diagram below shows three approximate locations of the sun along the western horizon. Which number indicates the location of the sun at sunset on autumnal equinox for an observer at a latitude of 45° N?
a. 1
b. 2
c. 3
d. The sun will set in the east for an observer in the northern hemisphere.
e. The sun will not set on autumnal equinox at this latitude.
A ________ is a body whose only acceleration is the downward acceleration due to gravity.
What will be an ideal response?
Conversion of Units: The following conversion equivalents are given:1.0 m = 100 cm 1.0 in = 2.54 cm 1.0 ft = 12 inIf a bin has a volume of 1.5 m3, the volume of the bin, in ft3, is closest to
A. 35 ft3. B. 41 ft3. C. 47 ft3. D. 53 ft3. E. 59 ft3.