Physics, 18.08.2019 08:30 22ksotoq

1. what conditions must exist in order for a force to do work on an object?

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Physics, 21.06.2019 23:20, drice517

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Physics, 22.06.2019 05:20, deedee363

Given the position vector of the particle r(t)=(t+1)i+(t^2−1)j+2t k, find the particle's velocity and acceleration vectors at t=1

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Physics, 22.06.2019 11:00, tdahna0403

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide? kg • what must the total momentum of the system be after the train cars collide? kg •