Homework Help: physics

Posted by Liz on Wednesday, October 28, 2009 at 10:08pm.

Suppose a 65-kg boy and a 45-kg girl use a massless rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3.0 m/s2, find the magnitude of the acceleration of the boy toward the girl.

physics - bobpursley, Wednesday, October 28, 2009 at 10:31pm
The forces are the same
massman*a_man=massgirl*a_girl

solve for the man's acceleration
physics - MathMate, Wednesday, October 28, 2009 at 10:31pm
Tension of rope = T N
Mass of girl, m = 45 kg
Acceleration = 3.0 m/s²
T = ma = 135 N
Mass of boy, M = 65 kg
T = MA,
solve for acceleration A.
physics - Brandy, Saturday, November 6, 2010 at 5:09pm
girl: 135 N
boy mass: 65 kg

135/65 = 2.0769 =

2.077 m/s^2

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