Cho cơ hệ như hình vẽ . Thả cho trụ rỗng theo phương thẳng đứng xuống dưới. Biết khối lượng của trụ m =5kg, bán kính R=20cm dây nhẹ, không giãn, g=10 Hỏi phân tích các lực tác dụng vào trụ rỗng . B) xác định gia tốc tịnh tiến, gia tốc góc của trụ rỗng theo m R g

250✖️100 to get you answer

W= fd
where f is an applied force and d is the distance over which it is applied. when a parachuting skydiver is at constant velocity, he is experiencing "terminal velocity", the point at which his acceleration down is canceled out by air resistance. that means that the resisting force of the air is equal to his weight, but in the opposite direction. with this, we can solve for the work done by the force.
w = fd
w = (92.0)(9.81 m/s^2) (325)
w= 2.93 x 10^5 j
the value for work in this case is positive because it is pushing up on the skydiver, who has a downward force of gravity.
therefore the answer is 2.93 x 10^5 j

Simple, don't do it. just don't go to that dock

Ithink it's  c. i'm sure