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* More lifting You exert a 630-N force on rope 2 in the previous problem (Figure P8.12). Write the two equations (x and y) for the first condition of equilibrium using the pulley as the object of interest for a force diagram. Calculate
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- (i) If you are trying to loosen a stubborn screw from a piece of wood with a screwdriver and fail, should you find a screwdriver for which the handle is (a) longer or (b) fatter? (ii) If you are trying to loosen a stubborn bolt from a piece of metal with a wrench and fail, should you find a wrench for which the handle is (a) longer or (b) fatter?arrow_forwardno friction # Will the ladder slip? A ladder of length l = 4m rests against a wall at 0 = 60°. ASsume that there is no friction between the ladder and (A ladder the vertical wall but there is friction between the ground and the ladder with u = 0.5. A person weighing 700 N starts to climb up the ladder. 1. Can the person make it to the top safely (without the ladder slipping)? If not, then find the distance d along the ladder that the person can climb safely. Ignore the weight of the ladder in comparison to the weight of the person. 2. Does the "no slip" distance d depend on 0? If yes, then find the angle 0 which makes it safe for the person to reach the top. W friction Barrow_forward1. The pulley system below has a 4 to 1 mechanical advantage; for this problem you can assume an ideal pulley system with massless, frictionless pulleys. Suppose you use this pulley system to lift a 25 kg mass up 30 cm at a constant speed. A. What is the tension in the rope? B. How far will you have to pull the rope? F Narrow_forward
- Hold your upper arm vertical and your lower arm horizontal with your hand palm-down on a table, as shown below. If you now push down on the table, you’ll feel that your triceps muscle has contracted and is trying to pivot your lower arm about the elbow joint. If a person with the arm dimensions shown pushes down hard with a 37.0 N force (about 8.3 lb), what force must the triceps muscle provide, in Narrow_forwardA5.4 kg cat and a 2.1 kg bowl of tuna fish are at opposite ends of the 4.0-m-long seesaw. (Figure 1) You may want to review (Pages 312 - 314). Part A How far to the left of the pivot must a 3.9 kg cat stand to keep the seesaw balanced? Express your answer to two significant figures and include the appropriate units. HÅ ? d = Value Units Submit Request Answer Provide Feedback Figure 1 of 1 > 2.0 m 2.0 marrow_forwardhung from the end supported by the cord. The cord is angled at 37° from horizontal. Directions: You MUST SHOW ALL WORK in order to get credit for you answers. Name AP Physics 1 TORQUE Quiz a, Diagram the forces acting on the rod. b. Label the forces acting on the rod. C. Calculate the tension acting along the cord. hinge Efama media-apparrow_forward
- F2, Problem 2. Three 10-N forces act on a beam as shown to the right. a. Calculate the torque produced by force 1 about point P. b. Calculate the torque produced by force 2 about point P. c. Calculate the torque produced by force 3 about point P. d. Calculate the net torque about point P. 60° 0.5 m 0.5m 0.5 marrow_forward100 g A 54 g uniform meter stick is to be suspended by a single string A 100-g block hangs from the left-hand edge of the meter stick Where should the string be attached so that the meter stick is in equilibrium? Briefly explain how you solved the problem. BI T.arrow_forwardThe cylinder and the block are connected by a horizontal cord. Determine the largest couple C (in N-m) that can be applied to the cylinder without disturbing the equilibrium of the system. Assume that both bodies are homogeneous. *Write your answer in two decimal places. 3m C. 68 kg 5 m 68 kg H= 3D0.28-arrow_forward
- TEXT ANSWER Question 22 When Jenny couldn't lift a box by herself, she decided to use a lever to move it. She placed a fulcrum 1.6 m away from the box and used a 2.0 m lever to try to lift the box. Her effort was still unsuccessful. Explain why Jenny was unable to lift the box with her lever, and sug- gest a way she can adjust the lever to improve her chances of success. Use math to support your answer.arrow_forwardConsider the following figure. a. What force in newtons should the woman in the figure exert on the floor with each hand to do a push-up? Assume that she moves up at a constant speed. _______ N b. The triceps muscle at the back of her upper arm has an effective lever arm of 1.76 cm, and she exerts force on the floor at a horizontal distance of 18.0 cm from the elbow joint. Calculate the magnitude of the force in newtons in each triceps muscle. _________ N Compare the magnitude of the total force exerted by both triceps muscles to her weight. total force exerted by both triceps muscles/her weight = c. How much work does she do in joules if her center of mass rises 0.255 m? _______ J d. What is her useful power output in watts if she does 21 push-ups in one minute? _______ Warrow_forwardF, F2, Problem 2. Three 10-N forces act on a beam as shown to the right. a. Calculate the torque produced by force 1 about point P. b. Calculate the torque produced by force 2 about point P. c. Calculate the torque produced by force 3 about point P. d. Calculate the net torque about point P. 60° F3 0.5 m 0.5 m 0.5 marrow_forward
- Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-HillPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning