Suppose two children push horizontally, but in exactly opposite directions, on a wagon containing a third child. The first child exerts a force of F₁ = 75.0 N, the second a force of F₂ = 93.0 N, friction is 12.0 N, and the mass of the third child plus wagon is 20.0 kg. (a) What is the system of interest if the acceleration of the child in the wagon is to be calculated? (Select all that apply.) the child in the wagon the children outside the wagon the wagon (b) Which of the following diagrams correctly represents the free body diagram for the situation described here? F₁ f N W N F₂ F₁ (d) What would the acceleration (in m/s²) be if friction is 18.0 N? 0 m/s² f N W F₂ (c) Calculate the acceleration (in m/s2). 0 X What is the net force acting on the system? Did you consider the appropriate direction of the friction force? m/s² F₂ f N W F₁

Suppose two children push horizontally, but in exactly opposite directions, on a wagon containing a third child. The first child exerts a force of F₁ = 75.0 N, the second a force of F₂ = 93.0 N, friction is 12.0 N, and the mass of the third child plus wagon is 20.0 kg. (a) What is the system of interest if the acceleration of the child in the wagon is to be calculated? (Select all that apply.) the child in the wagon the children outside the wagon the wagon (b) Which of the following diagrams correctly represents the free body diagram for the situation described here? F₁ f N W N F₂ F₁ (d) What would the acceleration (in m/s²) be if friction is 18.0 N? 0 m/s² f N W F₂ (c) Calculate the acceleration (in m/s2). 0 X What is the net force acting on the system? Did you consider the appropriate direction of the friction force? m/s² F₂ f N W F₁

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter5: Newton's Laws Of Motion

Section: Chapter Questions

Problem 35PQ: A black widow spider hangs motionless from a web that extends vertically from the ceiling above. If...

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Suppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon. The first child exerts a force of 75.0 N, the second a force of 98.0 N, friction is 12.0 N, and the mass of the third child plus wagon is 21.0 kg. (a) What is the system of interest if the acceleration of the child in the wagon is to be calculated? (Select all that apply.) the wagon the child in the wagon the children outside the wagon (b) Draw a free body diagram, including the weight and all other forces acting on the system. (c) Calculate the acceleration.(d) What would the acceleration be if friction is 23.0 N?
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