Tapered beams are used in a variety of applications to save both weight and cost. indeed, we see them in bridges, churches and tree branches. despite their weight savings, the weight of the beam must be consider when designing the structure lest it will fail. consider the illustrated tapered wood beam of length l = 6 m, thickness (into the screen) t = 20 cm, and big and small end heights h b i g = 100 cm and h s m a l l = 50 cm. knowing that the mass density of wood is rho = 700 kg/m 3 , determine the resultant force f r in n and resultant moment m r in nm about the base, i. e. big end, due to the weight of the beam.

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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the following is queen elizabeth’s purposes:

- to encourage the parliament that the technique of picking successors to the seat based merely on birthright needs to be reviewed.

- (not) to convince the parliament that her kid should not be measured as a likely choice for heir to the english power.

- to persuade the parliament that merely since she has a child does not assure that the kid will be a capable leader.

- to sway the parliament how shattering it could be if they proceeded discourteously concerning her or her child.

conservation of mass

mass before something happens = mass afterwards