1. explain why free-fall acceleration can be regarded as a constant for objects
falling within a few hundred miles of earth's surface.

it is because the Earth's mass is so big that the objects will fall at a constant rate. Calculate the mass in kg of an object that weighs 1225 N on Earth.

Explanation:

a is the best answer your welcome

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