2
Suppose we have a spaceship about the size of a typical ocean cruise ship today, which
means it has a mass of about 100 million kilograms, and we want to accelerate the ship to a
speed of 10% of the speed of light.
A)
How much energy would be required? (Hint: The spaceship’s speed is small compared to
the speed of light, so the kinetic energy of the spaceship will be .(1/2) *m *v^2
B)
In one sentence, how does your answer compare to the total world energy use at present,
which is about 5 x 10^20 joules per year?
C)
Suppose the cost of energy is 3¢ per 1 million Joules. At this price, how much would it
cost to generate the energy needed by this spaceship?
mass of space ship is 100*10^6 kg
speed of light is 299 792 458 m / s and 10% of speed of light is = 0.10*299 792 458 m / s=29979245.8m/s
kinetic energy=1/2 mass*(velocity)^2= 0.5*100*10^6kg*29979245.8m/s*29979245.8m/s= 4.49377*10^22 joules
PART B-
worlds consumption is 5*10^22 per years
E(spaceship)/E(world energy use)= 899
spaceship/Eworldenergyuse~ 1000
Part c-
cost for 1 million joules is 3$
so 4.49377*10^22 joules or 4.493775*10^16 million joules will cost
4.49377*10^16*3$=1.348133*10^17$
plzzz Like my work....thanks
Get Answers For Free
Most questions answered within 1 hours.