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m1 = 2.7 kg block slides on a frictionless horizontal surface and is connected on one side to a spring (k = 40 N/m) as shown in...Asked by john
m1 = 2.3 kg block slides on a frictionless horizontal surface and is connected on one side to a spring (k = 45 N/m) as shown in the figure above. The other side is connected to the block m2 = 3.6 kg that hangs vertically. The system starts from rest with the spring unextended.
What is the speed of block m2 when the extension is 65 cm?
What is the speed of block m2 when the extension is 65 cm?
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Answered by
Damon
do potential and kinetic energy
k = 45
g = 9.81
x = 0.65 max
Pe = Ke = 0 at start
Pe = (1/2) 45 (.65)^2 - 3.6 (9.81) (.65)
Ke = (1/2)(2.3+3.6) v^2
the sum is zero, solve for v (it could be + and it could be - :)
k = 45
g = 9.81
x = 0.65 max
Pe = Ke = 0 at start
Pe = (1/2) 45 (.65)^2 - 3.6 (9.81) (.65)
Ke = (1/2)(2.3+3.6) v^2
the sum is zero, solve for v (it could be + and it could be - :)