A light board, 10 m long, is supported by two sawhorses, one at one edge of the board and a second at the midpoint. A 40-N weight is placed between the two sawhorses, 3.0 m from the edge and 2.0 m from the center.
What forces are exerted by the sawhorses on the board?
Question 2
The sound level of a person talking at 1.0 m of distance is 60 dB. You are surrounded by five people all talking at the same time. What sound level are you being exposed to?
A)
600 dB
B)
60 dB
C)
74 dB
D)
67 dB
E)
81 dB