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Unformatted text preview: UD Phys207WD9 Quiz 3 Name You must show all of your work for credit. Include units with your numerical answe . A block of mass m=5kg is placed at rest on a smooth inclined plane of angle 9:30“.
a) Draw a FBD.
r b) Apply Newton's second law to the block.
c) What is the acceleration of'the object down the inclined plane?
d.) Determine the force P pointed parallel to the inclined plane that would be needed to keep
the object at rest.
e) Now we adjust the inclined plane so that the angle 9 is doubled. With the same force P still parallel to the inclined plane what is the acceleration of‘the block? FLﬂjCJXQ C) Qtﬂsne ="frq"‘/S‘l
F” ( PM) UD ?hy5207W09 Quiz 3 Name % You must show all of your work for credit. Include units with your numerical answers. A -1 0.0 kg block is pulled along a horizontal frictionless ﬂoor by a cord that exerts a force
P=20N at an angle of 30° relative to the horizontal. a) Draw a FBD for the block. b) Apply Newton's second law to the block. c] What is the acceleration of the block? d) If the force P is slowly increased, what is the value just before the block is lifted off of the
ﬂoor? (The block just begins to lift off the ﬂoor when the FN =0N.) ‘
e) What is the acceleration of the block just before it is lifted off of the floor. 3/; R30
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This note was uploaded on 03/01/2009 for the course PHYS 207 taught by Professor Castro during the Winter '09 term at De Haagse Hogeschool.
- Winter '09