Answer:
D. The input force is equal to the output force
Step-by-step explanation:
A pulley changes the direction of the applied force, but does not change its magnitude. The mechanical advantage is the ratio of output force to input force, so must be 1 when the force magnitude does not change.
Answer:
406.35
Step-by-step explanation:
40 times $9.45=378
2 times (9.45times1.5)= 28.35
28.35+378= 406.35
Answer:
13/18
Step-by-step explanation:
1.
2.
3.
4.
5.
Answer:
x = 36°
Step-by-step explanation:
The sum of the exterior angles of a pentagon is always 360°. Since the pentagon is regular, meaning that all of its sides and interior angles are congruent, we know that all of the exterior angles are also congruent. Since a pentagon has 5 sides, we know that there are 5 congruent exterior angles, therefore:
5 * 2x = 360
10x = 360
x = 36°
One has to derive each length (please check):
EF = sqrt( 2^2 + 2^2 ) = 2*sqrt(2)
FG =3,
So, parallelogram's perimeter is 2*EF+2*FG = 4*sqrt(2)+6=11.66
Triangle:
AB = sqrt( 2^2 + 3^2) = sqrt(13)
BC= sqrt(1^2_5^2)=sqrt(26)
AC=sqrt(2^2+3^2) = sqrt(13)
Total = 12.31
Difference Triangle - Parallelogram = 12.31-11.66 = 0.65
What about the LAST one? :P