the sound wave is equal to the distance between the speed of sound
The solution would be like this for this specific problem:
Given:
Oil spill radius constant rate increase = 1 m/s
r = 34m
Let the area of the spill
be A and then let its radius be r. <span>
Then A = π r². </span>
Differentiating with
respect to t: <span>
dA / dt = 2π r dr / dt. </span>
Substituting r = 34 and dr
/ dt = 1:
dA/dt = 2 π * r * dr / dt
dA/dt = 2π * 34 * 1 = 68π
= 214 m²/s, to 3 significant figures.
<span>So, given that the radius
is 34m, then the area of the spill is increasing at 214 m²/s.</span>
X axis :
Fx = 2.5cos(100)
Wx = Fx(X) = 2.5cos(100) x 3
... negative value as Fx has -x direction
y axis :
Fy = 2.5sin(100)
Wy = Fy(Y) = 2.5sin(100) x 5
Workdone = Wx + Wy
Answer: The correct answer is balanced force.
Explanation:
Balanced forces are balanced when the forces are acting equal in magnitude but opposite in direction. The balanced forces will not cause change in the speed of the object.
Unbalanced forces are unbalanced when the forces acting on the object are not equal in magnitude. The combined force is the difference between the forces. It will cause the change in the speed of the body.
Therefore, forces that are equal in size but opposite in direction are balanced.
