100 points
why did it take just six weeks for a keelboat to float down the mississippi to new orleans but four months to make the return trip?

a. keelboats carried a much heavier load on the return trip.

b. the return trip was upstream, against the flow of the river.

c. a keelboat's steam engine worked better with the wind than against it

d. once the goods had been delivered to new orleans, there was no hurry to get home.

the total distance traveled by the car is

30km + 49km = 79 km .

this would be about 43%

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft