Answer:
a = - 5.81 [m/s^2]
Explanation:
Using newton's second law, which tells us that the sum of forces is equal to the product of mass by acceleration, we can find acceleration. The forces acting are the weight of the helicopter and the lifting force.
W - Lf = m *a
W = weight of the helicopter [N]
Lf = lifting force = [N]
m = mass of the helicopter [kg]
a = acceleration [m/s^2]
- (4500*9.81) + 18000 = 4500 *a
a = - 5.81 [m/s^2]
The negative sign tells us that the helicopter is slowing down.
ρ=2.5⋅g⋅cm3............
Explanation:
ρ=Mass/Volume=5⋅g2⋅cm3,
and thus typically it has the units g⋅mL−1 or g⋅cm−3.
Here, mass=5⋅g, and volume=2⋅m3.
Their quotient is the density as shown. And this could be any solid material (generally solids are denser than liquids). You will have to look up tables of densities for common materials.
Answer:
Police powers are the fundamental ability of a government to enact laws to coerce its citizenry for the public good, although the term eludes an exact definition. The term does not directly relate to the common connotation of police as officers charged with maintaining public order, but rather to broad governmental regulatory power. Berman v. Parker, a 1954 U.S. Supreme Court case, stated that “public safety, public health, morality, peace and quiet, law and order. . . are some of the more conspicuous examples of the traditional application of the police power”; while recognizing that “an attempt to define police powers reach or trace its outer limits is fruitless.”
Explanation:
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