Fr2 15 kg
8 kg
m3
F = 45 N
m2
Consider the two-body situation at
the right in which two blocks are
connected by massless strings and
pulled along a frictionless surface by
a horizontal force.
a. What is the acceleration of each
block?
b. What is the tension force Fra in the
string?
Hint: Draw a separate free-body
diagram for each block.
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1. what is the relationship between wavelength and the penetrating power of an electromagnetic wave? a) the penetrating power has no relationship to the wavelength. b) the penetrating power increases as the wavelength increases. c) the penetrating power decreases as the wavelength increases. d) the penetrating power decreases as the wavelength decreases. 2. as ice melts and turns into water, the speed of sound through the material would most likely do what? justify your answer. a) the speed would not change because the material is always water. b) the speed of sound would increase because the density of water is less than that of ice. c) the speed of sound would increase because energy is added to ice in order to make it melt. d) the speed of sound would decrease because sound travels faster through solids than liquids. 3.which of these waves need a medium to travel through? a) sound b) x-rays c) infrared rays d) visible light