A man sitting on a merry-go-round(vertical type) moving in a circle of radius 20m
at speed of 5 m/s observes his apparent weight to be 1000N at lowest position.
Find his apparent weight at the highest position.
最好畫張圖講解埋 5畫都無所謂==
f5 phy
2010-09-07 3:10 am
回答 (1)
2010-09-07 4:44 am
✔ 最佳答案
Consider the lowest position,1000 - mg = m x 5^2/20
where m is the mass of the man, and g is the acceleration due to gravity
hence, m = 88.89 kg (take g = 10 m/s2)
At the highest position,
88.89g - R = 88.89 x 5^2/20
where R is the apparent weight at that position
i.e. R = 778 N
收錄日期: 2021-04-19 23:11:37
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