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- The Outlaw Run roller coaster in Branson, Missouri, features a track that is inclined at 80° below the horizontal and that spans a 49.4-m (162 ft) change in height. Y If the coefficient of friction for the roller coaster is the friction force on a 1800-kg coaster train? 0.30, what is the magnitude of Express your answer to two significant figures and include appropriate units. fx = 920 N Submit Part B. Correct Correct answer is shown. Your answer 919.88 N was either rounded differently or used a different number of significant figures than required for this part. Previous Answers How much work is done by friction during the time the coaster train travels along the incline? Express your answer to two significant figures and include appropriate units. W = -4.6x10¹ J Submit Previous Answers All attempts used; correct answer displayed Enter your answer with a different unit type. Review a list of acceptable units. Part C vju What is the speed of the coaster train at the bottom of the…(a) Draw the free body diagrams for the two blocks pictured below. There is friction on the ramp. 1 40° (b) Draw free body diagrams for the two situations involving a block of ice being pulled and pushed with an equal force and angle. 25° ) 25° (c) Is the normal force up on the block of ice from the floor equal in the two situations in (b)? If they are equal, explain why. If they are not, explain why and state which is larger.Blocks A and B are held on the palm of your outstretched hand as you lift them straight up atconstant speed. Assume mB>mA and that mhand=0.a. Draw separated free-body diagrams for A, B and your hand. Show all vertical forces andmake sure the vector lengths indicate the relative sizes of the forces.b. Rank in order from largest to smallest all of the vertical forces. Explain your reasoning.Now the hand is lifting the blocks so they have an upward acceleration.c. Draw separated free-body diagrams for A, B and your hand. Show all vertical forces andmake sure the vector lengths indicate the relative sizes of the forces.d. Rank in order from largest to smallest all of the vertical forces for when the block isaccelerating. Explain your reasoning.
- A massive block was pulled at an angle of 30o in a horizontal rough surface by a force of magnitude F enough for the block to move. If we set the +x-axis at the right, which of the following statements is true about the forces acting on the block? Explain answer. A. The direction of the frictional force experienced by the block is to the leftB. The normal force’s direction is 30 degrees above the +x-axisC. The block will not experience friction since F is just enough to move the block D. The direction of the weight of the block is about 210 degrees from the x-axis.A block is pulled by a rope at constant speed along a rough level surface by a rope that makes an angle of 30 degrees with respect to the horizontal. The applied force along the rope is p The force of kinetic friction between the block and the surface is 10 N.a.Which one of the following expressions gives the magnitude of the force ?10sin 30 degree or 10cos 30degrees b. Complete the following statement: The magnitude of the normal force could be reduced by A. decreasing the angle made by the rope. B. increasing the speed of the block. C. decreasing the coefficient of kinetic friction. D. increasing the angle made by the rope. c. Which of the following actions will increase the frictional force on the block? A. increasing the angle made by the rope B. increasing the weight of the block C. decreasing the speed of the block D. increasing the contact surface areaYou push a 5.0-kg block up a ramp by exerting a 100-N force directed parallel to the ramp, which is at a 30∘ angle to the horizontal. Part A Ignoring any effects due to friction, calculate the block's speed when you have pushed it 3.0 m if its velocity when you began pushing was 2.0 m/s up the slope. Express your answer with the appropriate units. Part B Now consider friction. If the coefficient of kinetic friction between block and ramp is μ = 0.25, what is the block's speed after you have pushed it 3.0 m ? Express your answer with the appropriate units Part C With this value of μk how much farther up the ramp does the block move once you stop pushing? Express your answer with the appropriate units.
- Ex: Determine the horigental and vertical compenents of the pin reaction at Bof fiqure on member ABC. The 2000lb force is applied to a. rope which. passes over the smooth pully at A . Neglect the weights of all members. →2000 مقوتقمدگ SelitThe diagram below shows an object of mass m= 20kg being acted upon by a force F=50N at an angle of θ=30o. The coefficient of kinetic friction between the object and the surface is 0.100. a.Draw a Free Body diagram for the object. Be sure to show all forces as well as the reference x,y axis. and Using Newton’s 2nd law, write the force equations for both the x and the y directions. Write these equations in terms of the letters m, F, θ, FN, g, f (little f stands for the friction force). X-direction: _______________________________________________________________ Y-direction:________________________________________________________________ b.Solve for the Normal Force c .Use your answer from part b to find the frictional force. d .Solve for the acceleration of the object. e.If this object was originally moving at 4 m/s, how fast would it be moving after 8 seconds? f .How far will…he FBD of the block should have looked like this. 1. A contestant in a winter sporting event pushes a block of ice of mass m across a frozen lake as shown in the figure. The coefficient of static friction between the block and ice is μs, and the coefficient of kinetic friction is μk. θ is the angle the force makes with the x-axis. In this part, we are going to set-up Newton's second Law equations for the cases(1) when the ice block just starts moving, and(2) when it is accelerating to the right with an acceleration a. All answers are symbolic. ALL ANSWERS ARE CASE-SENSITIVE. Subpart 1: Newton's Second Law along the y-axis (i) Write Newton's Second Law along the y-axis by adding all forces in the y-direction taking into account their signs (forces pointing upwards are positive and downward are negative) in terms of the normal force N, weight mg, F and θ. In both scenarios, there is no acceleration along the y-direction, therefore, ay=0.…
- In a laboratory experiment on friction, a 135-N block resting on a rough horizontal table is pulled by a horizontal wire. The pull gradually increases until the block begins to move and continues to increase thereafter. The figure shows a graph of the friction force on this block as a function of the pull. a. Why does the graph slant upward in the first part but then level out? b. What would the graph look like if a 135-N brick were placed on the box, and what would the coefficients of friction be in that case?Three cables are used to hold a hot-air balloon in place. The tension in the cable AD is 658 N. Draw the Free Body Diagram at A. Upload this along with your all your workings for this problem to the dropbox. What is the tension in the cable AB? Enter using 3 significant figures. What is the tension in the cable AC? Enter using 3 significant figures. What is the vertical force V exerted by the balloon at point A? Enter using 4 significant figures.A block is being pulled by the string as shown below. The string has a tension T and makes an angle with the horizontal. A student claims that the kinetic friction is given by μmg where m is the mass of the block and uk is the coefficient of kinetic friction. Is or isn't this expression correct? Explain your reasoning. Hk m T 0