A father pulls his identical twins on identical sleds tied one after the other.

Question

A father pulls his identical twins on identical sleds tied one after the other. He exerts a force F that makes an angle of 30degrees with the horizontal and that leads to an acceleration of the two sleds. The mass of each sled with its twin is m. Assume no friction. A.) What is the tension in the rope that he is pulling ?
B.)What is the the tension in the rope that connects the two sleds

Explanation / Answer

for the first sled ma=Fcos30-T for the second sled; ma= T --> ma+ma=Fcos30-->a=Fcos30/2m --> T=Fcos30/2 (this is the tension between two sleds) the tension in rope that father is pulling is = F

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