Will give brainleist 10k points

175 m/s

Explanation:

Resource Used:

https://www.chegg.com/homework-help/questions-and-answers/stion-10-20-roller-coaster-car-mass-250-kg-car-sitting-top-25-m-hill-gravitational-potenti-q74508847

I hope this helps you in any shape or form.

answer: look it out

explanation: mark me as brainliest

dr. kings dream speech

explanation:

it was late in the day and hot, and after a long march and an afternoon of speeches about federal legislation, unemployment and racial and social justice, the rev. dr. martin luther king jr. finally stepped to the lectern, in front of the lincoln memorial, to address the crowd of 250,000 gathered on the national mall.