I have the answer to this question but i don't know how it was reached. A woman pushes two crates, weighing 4kg and 20kg, across a frictionless floor. The crates are next to and touching each other. If she exerts a force of 36 N on the smaller crate, approximately what force does the smaller crate exert on the larger crate. the options are 36N, 30N, 200N, or 240 N. 30 is the correct answer. i'm having trouble drawing a freebody diagram for this problem. thanks
2007-10-17 09:31:31 · 1 answers · asked by Anonymous in Science & Mathematics ➔ Physics
If the two boxes stay together, they have to have the same velocity and the same acceleration.
From the woman's point of view, she is pushing a mass of 24Kg. From the small box's point of view, it is pushing the the mass of the 20kg box.
Since F = M x A and the the accelartions are the same, the forces must be proportional to the masses.
2007-10-18 19:34:04 · answer #1 · answered by simplicitus 7 · 0⤊ 0⤋