jmartinez638
  • jmartinez638
Will medal and fan: A child drags 2 boxes (12 kg and 10kg) behind her bicycle as shown below. Is she pulls the boxes with a force of 40N, a) what is the tension in the string connecting the boxes and b) what is the acceleration of each box?
Physics
  • Stacey Warren - Expert brainly.com
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schrodinger
  • schrodinger
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jmartinez638
  • jmartinez638
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jmartinez638
  • jmartinez638
@Luigi0210
Brrandyn
  • Brrandyn
Relate to the understanding of Newton's 3rd Law of Motion where forces come in pairs, such that anytime an "action force" acts on an object, there's an equal & opposite "reaction" force. For connected objects, internal forces cancel while outside forces remain in effect. In this instance, because it's a system, use a derivation of Newton's 2nd Law of Motion to calculate both part a and b. \[\large\ ΣF=ma\] ΣF = all forces acting on the system, therefore.. a) Is there force tension? b)\[40 = (10+12kg)(a)\]\[Acceleration (of the system) = 1.81 m/s ^{2}\]

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Brrandyn
  • Brrandyn
|dw:1449183689952:dw|
jmartinez638
  • jmartinez638
How would I find the tension?
jmartinez638
  • jmartinez638
I know you're trying to show me, I'm just a bit clueless.
jmartinez638
  • jmartinez638
Would it be m1 = (12 kg)(9.81m/s2)= 117.6 N & m2 = (10 kg)(9.8m/s2)= 98N → T = (m1+m2) + 40N = 117.6 N + 98N + 40N = 255.6 Newtons of tension between the two boxes.
Brrandyn
  • Brrandyn
"Anytime an "action force" acts on an object, there's an equal & opposite "reaction" force."
jmartinez638
  • jmartinez638
so...? Is my solution incorrect lol?

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