Two air-track carts move toward one another on an air track. Cart 1 has a mass of 0.35kg and a speed of 1.2m/s.Cart 2 has a mass of 0.61kg. What speed must cart 2 have if the total momentum of the system is to be zero? Since the momentum of the system is zero. does it follow that the kinetic enery of the system is alos zero?
my answer: momentum=mass x velocity
.35 x 1.2= .42 so .61 x ?= 0.42
0 .69 is the speed of cart 2
kinetic energy= 1/2mass x velocity so
1/2(.61) x .69= 0.21
Am I doing this correctly?
2007-03-13
08:08:34
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2 answers
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asked by
christy r
1
in
Science & Mathematics
➔ Physics