Cart a and cart b are moving toward each other. they collide and come to rest at the point of impact. from this observation, we can conclude that the carts
have equal masses
were moving with equal and opposite momentum
were moving with equal and opposite velocities
were moving with equal kinetic energies

were moving with equal and opposite momentum

Explanation:

As we know that in all collision net external force on the system of two masses will be ZERO

so we can use momentum conservation

if we have

F = 0

so we have

so correct answer will be

were moving with equal and opposite momentum

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