※ 引述《reideen107 (理想一直都在)》之銘言：
: 6. Figure represents the total acceleration of a particle moving clockwise in
: a circle of radius
: 2.50 m at a certain instant of time. At this instant, find
: (a) the radial acceleration,
acos(π/6)
: (b) the speed of the particle, and
a = v^2 / r => v = √(ra)
: (c) its tangential acceleration.
asin(π/6)
: 7. A simple pendulum has a mass of 0.250 kg and a length of 1.00 m. It is
: displaced through an
: angle of 15.0 and then released. What are
: (a) the maximum speed,
MgL(1-cos(π/12)) = (1/2)MV^2
可以解出V
: (b) the maximum angular acceleration, and
在最低點的地方
V為(a)的結果
max a = (T-Mg)/M = V^2/L
: (c) the maximum restoring force?
左右兩端的地方
Mgcos(π/12)
: 9.A 12.0-g wad of sticky clay is thrown horizontally at a 100-g wooden block
: initially at rest on
: a horizontal surface. The clay sticks to the block. After impact, the block
: slides 7.50 m before
: coming to rest. If the coefficient of friction between the block and the
: surface is 0.650, what
: was the speed of the clay immediately before impact?
滑行距離L
0^2 = (Vb)^2 - 2gμL
求出Vb
mv = (m+M)Vb
=>求出v
: 請敎一下，感謝@@"
: 附上題目網址
: http://0rz.tw/ab4hJ
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 122.124.98.222