A certain spring has a force constant k . (a) If two such identical springs are connected in parallel to each other as shown in part (a) of Figure 6-36 , does the resulting double spring have an effective force constant that is greater than, less than, or equal to k ? Explain. (b) If two of the original springs are connected as shown in part (b) of Figure 6-36 , does the resulting double spring have an effective force constant that is greater than less than or equal to k ? Explain. Figure 6-36 Problem 15
A certain spring has a force constant k . (a) If two such identical springs are connected in parallel to each other as shown in part (a) of Figure 6-36 , does the resulting double spring have an effective force constant that is greater than, less than, or equal to k ? Explain. (b) If two of the original springs are connected as shown in part (b) of Figure 6-36 , does the resulting double spring have an effective force constant that is greater than less than or equal to k ? Explain. Figure 6-36 Problem 15
A certain spring has a force constant k. (a) If two such identical springs are connected in parallel to each other as shown in part (a) of Figure 6-36, does the resulting double spring have an effective force constant that is greater than, less than, or equal to k? Explain. (b) If two of the original springs are connected as shown in part (b) of Figure 6-36, does the resulting double spring have an effective force constant that is greater than less than or equal to k? Explain.
The work done by a constant force applied to a block
while it is moving is calculated and the result gives a
negative value; we can say with certainty that:
a) The force has a component perpendicular to the
displacement.
b) The force does not have a component perpendicular
to the displacement.
C) The force has an antiparallel component to
displacement.
d) The force is perpendicular to the displacement.
Replace the three forces which act on the bent bar by a force-couple system at the support point A. Then determine the x-intercept of
the line of action of the stand-alone resultant force R. The couple is positive if counterclockwise, negative if clockwise.
y
2350 lb
4.9'
1070 Ib
•A
B.
31°
•D
E
2.4'
790 Ib
4.5'
Answers:
Force-couple system at A
R= (
i
i+
i
j) Ib
MA =
i
Ib-ft
Stand-alone resultant
X =
i
ft
Problem: A 50kg block is pulled up by a tensile force a 175N and pushed up by a force F= 200N both applied parallel to the plane of contact. If the block is moved up an inclined plane at 30 degrees with height of 20m. use coefficient of friction 0.20
Determine:
a) frictional force (in Newton)
b) work done by the friction
c) work done by the tension
d) total work done
e) rate of work if work was done in 20seconds (express answer in Joule/s)
*answer with complete solution
*THREE decimal places all final answer
*DRAW a diagram with proper labels
*use value of gravity (9.81)
*enclose all final answers with a box
thank you po
Chemistry: An Introduction to General, Organic, and Biological Chemistry (13th Edition)
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