(2) A force with magnitude 8.86 N pushes three boxes with masses m₁ = 1.30 kg, m₂= 3.20 kg, and m3 = 4.90 kg, as shown in the figure below. The surface the boxes are sliding on is so slippery that the surface can be considered to be frictionless. (a) Calculate the force that boxes 1 and 2 exert on each other and the force that boxes 2 and 3 exert on each other. [answer: F2-on-1 F1-on-2 = 7.63 N; F3-on-2 = F2-on-3 = 4.62 N]. (b) To obtain the values of F1-on-2 and F3-on-2 in (a), you needed to assume that Newton's 3rd Law is valid. If you examine the FBD for m2, you should see that F1-on-2-F3-on-2 = m2a. Verify the validity of Newton's 3rd Law by showing that the values of F1-on-2 - F3-on-2 and m2a are indeed equal. [answer: They are both equal to 3.0 N.] Fnet = ma

(2) A force with magnitude 8.86 N pushes three boxes with masses m₁ = 1.30 kg, m₂= 3.20 kg, and m3 = 4.90 kg, as shown in the figure below. The surface the boxes are sliding on is so slippery that the surface can be considered to be frictionless. (a) Calculate the force that boxes 1 and 2 exert on each other and the force that boxes 2 and 3 exert on each other. [answer: F2-on-1 F1-on-2 = 7.63 N; F3-on-2 = F2-on-3 = 4.62 N]. (b) To obtain the values of F1-on-2 and F3-on-2 in (a), you needed to assume that Newton's 3rd Law is valid. If you examine the FBD for m2, you should see that F1-on-2-F3-on-2 = m2a. Verify the validity of Newton's 3rd Law by showing that the values of F1-on-2 - F3-on-2 and m2a are indeed equal. [answer: They are both equal to 3.0 N.] Fnet = ma

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”

Question

(2) A force with magnitude 8.86 N pushes three boxes with masses m₁ = 1.30 kg, m2 = 3.20 kg, and m3 = 4.90
kg, as shown in the figure below. The surface the boxes are sliding on is so slippery that the surface can be
considered to be frictionless.
(a) Calculate the force that boxes 1 and 2 exert on each other and the force that boxes 2 and 3 exert on each
other. [answer: F2-on-1 = F1-on-2 = 7.63 N; F3-on-2 = F2-on-3 = 4.62 N].
(b) To obtain the values of F1-on-2 and F3-on-2 in (a), you needed to assume that Newton's 3rd Law is valid. If
you examine the FBD for m2, you should see that F1-on-2-F3-on-2= m2a. Verify the validity of Newton's 3rd
Law by showing that the values of F1-on-2 - F3-on-2 and m2a are indeed equal. [answer: They are both equal to
3.0 N.]
Fnet = ma
F = 8.86 N
1.30 kg
3.20 kg
t
4.90 kg

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