- 9 When A Student Performed Magic He Hid A Small Strip Magnet In His Sleeve And Then Pointed His Finger At A Hanging Me 1 (61.32 KiB) Viewed 50 times
9. When a student performed magic, he hid a small strip magnet in his sleeve and then pointed his finger at a hanging me
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9. When a student performed magic, he hid a small strip magnet in his sleeve and then pointed his finger at a hanging me
9. When a student performed magic, he hid a small strip magnet in his sleeve and then pointed his finger at a hanging metal ball. As a result, the ball fluttered under his magical power. Assume that when the hidden small magnet is located at a position C (ZQCS=30°) at the upper left of the ball, the angle of the metal ball from the vertical direction is also 30°, as shown in the figure below. The mass of the ball is m, and the mass of the student (including the magnet) is M, and at this time: (1) What is the magnitude of the pulling force of the thin wire that hangs the ball? (2) What are the magnitude of the normal force and friction force of the student? 300 HA
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