Suppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon. The first child exerts a force of 74.0 N, the second a force of 95.0 N, friction is 18.0 N, and the mass of the third child plus wagon is 23.0 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 children outside the wagon the child in the wagon the wagon (b) Draw a free-body diagram, including all forces acting on the system. N F₁ N 7 W

Suppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon. The first child exerts a force of 74.0 N, the second a force of 95.0 N, friction is 18.0 N, and the mass of the third child plus wagon is 23.0 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 children outside the wagon the child in the wagon the wagon (b) Draw a free-body diagram, including all forces acting on the system. N F₁ N 7 W

Name: 6.rises/last?dep=284331910UpdateDETAILSSuppose two children push hori
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Description: 6.rises/last?dep=284331910UpdateDETAILSSuppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon. The first child exerts a force of 74.0 N, the second a force of 95.0 N, friction is 18.0 N, and themass o

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter9: Linear Momentum And Collisions

Section: Chapter Questions

Problem 30P: A 0.450-kg hammer is moving horizontally at 7.00 m/s when it strikes a nail and comes to rest after...

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A 0.450-kg hammer is moving horizontally at 7.00 m/s when it strikes a nail and comes to rest after driving the nail 1.00 cm into a board. Assume constant acceleration of the hammer-nail pair. a. Calculate the duration of the impact. b. What was the average force exerted on the nail?
While sliding a couch across a floor, Andrea and Jennifer exert forces FA and FJ on the couch. Andrea’s force is due north with a magnitude of 130.0 N and Jennifer’s force is 32 east of north with a magnitude of 180.0 N. (a) Find the net force in component form. (b) Find the magnitude and direction of the net force. (c) If Andrea and Jennifer’s housemates, David and Stephanie, disagree with the move and want to prevent its relocation, with what combined forceFDS should they push so that the couch does not move?
Show that the acceleration of any object down an incline where friction behaves simply (that is, where fk=kN ) is a=g(sinkcos). Note that the acceleration is independent of mass and reduces to the expression found in the previous problem when friction becomes negligibly small (k=0).
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Balancing carefully, three boys inch out onto a horizontal tree branch above a pond, each planning to dive in separately. The third boy in line notices that the branch is barely strong enough to support them. He decides to jump straight up and land back on the branch to break it, spilling all three into the pond. When he starts to carry out his plan, at what precise moment does the branch break? Explain. Suggestion: Pretend to be the third boy and imitate what he does in slow motion. If you are still unsure, stand on a bathroom scale and repeat the suggestion.
cs (1) Lab. section 1 rd My courses First Semester 2020/2021 Faculty of Arts and Sciences Physics (1) Lab. section 1 Determine the resultant of two forces if EFx= 40g.wt and EFy=100 g.wt, using method of components Select one: O a. 111.8 g.wt, 63.4° O b. 122.1 g.wt, 55° O c. 107.7 g.wt, 68.2° O d. 116.6 g.wt, 59° O e. 104.4 g.wt, 73.3° page Next pag NEXT ACTIV Jump to.. Physics lab 1 2020-202
mc 1) A cart having mass mc is connected to a hanging mass mp as shown in the figure. When the cart is released from rest, it accelerates towards the pulley. (There is no friction on the table surface or in the pulley. The masses of pulley and the string are negligible. g=9,8 m/s2) For m.=0,25 kg and mp 20gr %D a) What would be the acceleration of the cart ? b) What would be the acceleration if an extra mass of 0.25 kg was placed on the cart?
3. Two blocks with unequal masses, M and m (M> m), are connected by a light, very long string passing over a pulley of negligible mass, as shown in the figure, and then released. Friction is negligible. a. If one of your classmates calculated that, once released, the acceleration of the blocks would be g, '6 without doing any calculations, say whether or not this could be a reasonable value for the acceleration. Draw and label a free body diagram (FBD) for each block. (Be sure your drawings show clearly any information you know about the directions and relative magnitudes of the forces.) Rank the relative magnitudes of all forces in your FBDS. (I'm looking for a single ranking that includes every different force drawn and labeled in both FBDS, separated by , or =.) heavy block: b. light block: relative sizes of all forces in FBDS: C. Use the FBDS from the previous part, and Newton's 2nd Law, to derive an expression (in terms of M, m and g) for the acceleration of the blocks once…
2. The baggage truck A shown in the photo has a weight of 560kg and tows a 400kg cart B and a 295kg cart C. For a short time, the driving frictional force developed at the wheels of the truck is FA= (40z-) Newtons, wheret is in seconds. If the truck starts with a velocity of 1.50m/seconds, determine its speed (m/s) in 5.50 seconds. Also, what is the horizontal force (in Newtons) acting on the coupling between the truck and cart B at this instant? (