Recall the motion of the block in part B. For each force that you identified, state whether that force did positive work, negative work, or zero work on the block. Explain.
The sum of the works done by all forces exerted on an object is called the network,
Is the net work done on the block greater than, less than or equal to the work done by the net force on the block? Explain your reasoning.
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- Two objects of different mass start from rest and are pulled horizontally with negligible friction by the same magnitude net force and moved through the same distance. The work done on object 1 is 4000 joules. After the force has pulled each object, object 1 is seen to move with half the speed of object 2. Answer the following questions and show your work. a. How much work is done on object 2? b. What is the kinetic energy of object 1 after being pulled? Explain. C. What is the kinetic energy of object 2 after being pulled? Explain. d. What is the ratio of the mass of object 1 to the mass of object 2? Explain and show work.arrow_forwardSc - A 0.60 kg book slides on a horizontal table. The kinetic friction force on the book has magnitude 1.4 N. ! 1 #: A N @ 2 How much work is done on the book by friction during a displacement of 3.8 m to the left? Express your answer with the appropriate units. 4 ? W₁ = Value Units ! You have already submitted this answer. Enter a new answer. No credit lost. Try again. Submit Previous Answers Request Answer Part B The book now slides 3.8 m to the right, returning to its starting point. During this second 3.8 m displacement, how much work is done on the book by friction? Express your answer with the appropriate units. HÅ 4 W₂ = Value Units Submit P Pearson Copyright © 2022 Pearson Education Inc. All rights reserved. Terms of Use | Privacy Policy | Permissions | Contact Us | Therefore, the work done on the book is -4.29 J. 12,772 APR 28 tv ST A 888 DII 44 F7 F4 F6 FB F2 W S X 1 option command #m 3 80 F3 E D $ 4 C Y R F 25 % V F5 T Request Answer G ^ 6 B Y & 7 H U N ? * 00 8 J I M \ ( 9…arrow_forwardPROBLEM SET # 10: WORK DONE BY A VARYING FORCE On the space provided, present correct and organized solutions to the following answered problems. Box the final answers. Detach each page neatly and submit to your instructor. 1. A particle was subjected to a force F, that varies with position as described by the F vs. x graph below. How much work was done by the force on the body as it moves from x = 0 to x = 10.0 m? (Ans: 22.5 J) 4.00 3.00 F N 2.00 1.00 0.00 0.0 5.0 10.0 15.0 X, marrow_forward
- Two objects of different mass start from rest and are pulled horizontally with negligible friction by the same magnitude net force and moved through the same distance. The work done on object 1 is 4000 joules. After the force has pulled each object, object 1 is seen to move with half the speed of object 2. Answer the following questions and show your work. a. How much work is done on object 2? What is the kinetic energy of object 1 after being pulled? Explain. b. What is the kinetic energy of object 2 after being pulled? Explain. с.arrow_forwardPROBLEM SET # 9: WORK DONE BY A CONSTANT FORCE On the space provided, present correct and organized solutions to the following answered problems. Box the final answers. Detach each page neatly and submit to your instructor. 2. An 8.5-kg block is pushed along a horizontal rough surface by a 40-N force inclined at 20° with the horizontal. The coefficient of friction between the surface and block is 0.35. If the block has an initial velocity of 3.6 m/s and the force does 200 J of work on the block, find: (a) The total distance moved by the block. (Ans: 5.32 m) (b) The final velocity of the block. (Ans: 4.85 m/s)arrow_forwardA 75 kg object experiences a horizontal force which causes it to accelerate at 15 m/s^2, moving it a distance of 9 m, horizontally. How much work is done by the force? Show your work. FORMULAS W=FdcosO F=ma Where: W=work F-force applied d=displacement m=Fla a=F/m v=d/t d=vt m=mass a=acceleration v=velocity t=time t=v/d Pear Deck Interactive Slide Students, draw anywhere on this slide! Do not remove this bararrow_forward
- Direction: solve the given problem. Show your solution. 1. You joined a "dogsled" race during your winter break. To start you pulled the sled ( total mass of 85kg) with a force of 195N at 45° above the horizontal. Find the work done on the sled after it moves at a distance of 7m.arrow_forwardPROBLEM SET # 10: WORK DONE BY A VARYING FORCE On the space provided, present correct and organized solutions to the following answered problems. Box the final answers. Detach each page neatly and submit to your instructor. 2. It takes a force of 35 N to stretch a 45-cm spring to 90 cm and hold it there. How much work was exerted to stretch the spring as described? (Ans: 7.88 J)arrow_forwardSolve the following problem. Show your solution. 1. How much work is needed to lift a 5.0 kg backpack to a shelf 1.0m above the floor?arrow_forward
- The problem 67a is attached. I received the wrong solution already once. Please use the equation sheet attached and start with an equation on this sheet and show all algebra and conversion of formula and ALL steps. Please do not use U for velocity. Use V and subscript. I know the final answer and I know most steps but I need help with pulling it together. Please show all work. Final answer is 5.6m. Please help me get to this answer. I believe FnetdeltaT=deltaMA needs to be used first.arrow_forwardTRUE or FALSE. Read and analyze each statement carefully. Click TRUE if the given statement is true, otherwise, click FALSE. 3) The product of the average force exerted and the displacement traveled in the direction of that force is called work. True Falsearrow_forward1 A block is placed on an elevator platform that moves downward with decreasing speed. Consider the time interval At, in which the speed of the platform changes from v, to zero. Decreasing speed (from v, to zero) Block a. In the space provided, sketch a free-body diagram for the block. b. Is the net work done on the block positive, negative, or zero? Platform For each force on the free-body diagram, state whether the work done on the block by that force is positive, negative, or zero. Explain. Free-body diagram for block Rank the works you identified above in order of decreasing absolute value. Explain. c. Consider reference frame R, moving downward with constant speed v.. In reference frame R: Direction of acceleration Direction of i. In the spaces provided, draw arrows to indicate the direction of the velocity and the acceleration of the block in reference frame R during the interval At,. Explain. velocity of block of block ii. In reference frame R: • is the block speeding up,…arrow_forward
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