Newton's Second Law
Answers
- Write a formula
that can be used to calculate the force due to weight.
Force = mass x acceleration due to gravity
- Convert the mass
of the airplane into kilograms. 317 kg (300
kg in significant figures)
- Now calculate the
force due to weight on the Wright brothers' airplane.
2 940 newtons ( 3106 N in sig figs)
- In order for their
airplane to fly, the lift force must have exceeded: 3106
N
- The Wright brothers'
airplane flew 120 feet in 12 seconds. Calculate its speed in feet per
second. 10 ft/s
- Convert this speed
to meters/second. 3 m/s
- If Orville had
gained 5 kilograms before the flight, calculate what the lift force
would have been. 2989 newtons ( 3155.6 N
in sig figs)
- If the Wright brothers'
airplane had weighed only 675 pounds, what would the lift force have
been? 2998.8 newtons
- A Boeing 747 has
a mass of 1,764,000 kg. What is the lift force required to get it off
the ground? 1.73 x 107 N
- A Boeing 727 has
a mass of 396,900 kg. What is the lift force required to get it off
the ground? 3.89 x 10 6 N
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