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Unformatted text preview: 35° r C Module 2 Show all work and reasoning in your solution to each problem for full credit. Problems Chapter 4: 3. Two horizontal forces, F1 and F2 , are acting on a box, but only F1 is shown on the drawing. F2 can point either to the right or to the left. The box moves only along the x axis. There is no friction between the box and the surface. Suppose that =+ . F1 9 0N and the mass of the box is 3.0kg. Find the magnitude and direction of F2 when the acceleration of the box is = =+ . . =+ . / a Fm 9 0N3 0kg 3 0 m s2 a) +5.0 m/ s2 + . + . / =+ . 9 0N 5 0 m s2 1 8kg to t h e rig h t b) 5.0 m/ s2 + . 9 0N . / = 5 0 m s2 . 1 8kg to t h e left c) 0 m/ s2 + . / = 9 0N0 m s2 undefined by division by 0 INSTRUCTORS NOTES: # 3: ∑ F = ma so, F = ma  F Then, a) F = +6N b) = 24N c) = 9.0N 7. ssm Interactive Learning Ware 4.1 at www.wiley.com/college/cutnell reviews the approach taken in problems such as this one. A 1580kg car is t raveling with a speed of 15.0 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 50.0 m? , = ; , = / ; , = final speed v 0 initial speed v0 15 m s distance d 50m = + = = 0 152 2a50∶ a = 152250 = 225100 . / 2 25 m s2 indicating car is slowing down = F 1580kg . / = 2 25 m s2 3555N required to h alt t h...
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This note was uploaded on 07/24/2010 for the course PHYSICS ph205 taught by Professor Brumm during the Spring '10 term at Grantham.
 Spring '10
 BRUMM
 Physics, Force, Work

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