How would you change the design of the barricade if heavier cars were used? Explain your design changes in terms of energy and work.

iron would move it is magnetic there is a mag field around the current in the wire

i don't understand. explain it clearly

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