Answer: B
Step-by-step explanation:
Z=ya=c gggggggggggggggggggggggg
Answer:
Approximately , assuming that .
Step-by-step explanation:
When the force is constant, moving by in the direction of the force would do a work of .
However, in this example, as an increasing portion of the chain gets lifted up, the force lifting the chain would increase in size. Hence, apply the integral form of this equation.
Let denote the force required to lift the chain when the height above the ground is meters. At that moment, exactly of the chain would be above the ground. The mass of that much of the chain would be the mass of the whole chain.
.
Integrate with respect to :
.
In other words, it would take approximately of energy to raise one end of the chain to that height of .
Answer:
Answer:
The width is 4 units, and the length is 10 units.
Step-by-step.
Step-by-step explanation:
area of rectangle = length * width
Let L = length; let W = width.
"The length is 6 units greater than the width.": L = W + 6
area = LW = 40
Since L = W + 6, we substitute L with W + 6.
(W + 6)W = 40
W^2 + 6W = 40
W^2 + 6W - 40 = 0
(W - 4)(W + 10) = 0
W - 4 = 0 or W + 10 = 0
W = 4 or W = -10
A width cannot be a negative number, so we discard the solution W = -10.
W = 4
L = W + 6 = 4 + 6 = 10
The width is 4 units, and the length is 10 units.