A 68.0 kg crate is dragged across a floor to the right by pulling on a rope attached to the crate and inclined 15.0° above the horizontal. (a) If the coefficient of static friction is 0.500, what minimum force magnitude is required from the rope to start the crate moving? (b) If the coefficient of kinetic friction is 0.350, what is the magnitude of the initial acceleration of the crate?
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- A boy exerts 50.0 N to push an object across a horizontal surface at constant velocity. If the object has a mass of 10.0 kg, what is the coefficient of kinetic friction between the object and the surface? How much force is needed in Problem 2 if the boy exerts the force at an angle of 30.0° above the horizontal. Show the free-body diagram and sketch of the given.A wooden block of mass 0.200 kg is given an initial velocity up an aluminum ramp set at a 21° angle above the horizontal. The coefficient of kinetic friction between the wood and the ramp 0.19, and the coefficient of static friction 0.25. is k is us = = Determine the magnitude of the acceleration of the wooden block while it is sliding up the ramp. Give your answer to 2 significant figures. m s²A 48.0 kg crate of tools rests on a horizontal floor. You exert a gradually increasing horizontal push on it, and the crate just begins to move when your force exceeds 313 NN. Then you must reduce your push to 208 NN. to keep it moving at a steady 25.0 cm/scm/s. What are the coefficient of static and kinetic friction between the crate and the floor? Enter your answers numerically separated by a comma.
- Block B in the figure weighs 796 N. The coefficient of static friction between block and table is 0.28; angle 0 is 34°; assume that the cord between B and the knot is horizontal. Find the maximum weight of block A for which the system will be stationary. Number i Units B Knot 0A boy exerts 50.0 N to push an object across a horizontal surface at constant velocity. If the object has a mass of 10.0 kg, what is the coefficient of kinetic friction between the object and the surface? How much force is needed in Problem 2 if the boy exerts the force at an angle of 30.0° above the horizontal.A person pushes on a stationary 125 N box with a force of 93N at 30 degrees below the horizontal. The coefficient of static friction between the box and the horizontal floor is 0.76. what is the normal force on the box? what is the friction force on the box? what is the largest the friction force could be? the person now replaces his push with a 93N pull at 30degrees above the horizontal. Find the normal force on the box in this case.
- A person pushes horizontally with a force of 221 N on a 55.0 kg crate to move it to the right across a level floor. The coefficient of kinetic friction is 0.350. What is the magnitude of (a) the frictional force and (b) the crate's acceleration? The directions of the four forces and the acceleration must be identified. Make a free-body diagram. Please use the blue vector to specify forces and the pink vector for acceleration. Please make sure to label each vectors. The labels should none, mg, fk, a, FN, or Fpushing.1) The block on a 60° inclined plane weighs 100 pound and is held by the minimum possible force T as shown in the figure. The coefficient of both static and kinetic friction between the block and the inclined plane is 0.2, and the pulleys are frictionless. T а. Draw the free body diagram (FBD) of the block showing all forces and their directions acting on it. b. Compute all unknown forces including T shown in your FBD. Now if you want to move the block upward on the inclined plane С. by applying minimum possible force T then draw the FBD of the block showing all forces with directions acting on it. d. Now assume the pulleys are stuck (do not rotate any more) and the 60° rope slides over the stuck pulleys as the block moves up. the coefficient of both static and kinetic friction between the pulley surface and the rope is 0.1. Draw the FBD of the block showing all forces with directions acting on the block when the block is pulled upward by the minimum rope force T. е. For the stuck…Some sliding rocks approach the base of a hill with a speed of 11.0 m/s . The hill rises at 42.0 ° above the horizontal and has Part A coefficients of kinetic and static friction of 0.350 and 0.580, respectively, with these rocks. Start each part of your solution to this problem with a free-body diagram. Find the acceleration of the rocks as they slide up the hill. Express your answer in meters per second squared. ? a = m/s? Submit Request Answer Part B Once a rock reaches its highest point, will it stay there or slide down the hill? stay there slide down the hill Submit Request Answer Part C If it slides down, find its acceleration on the way down, else enter 0. Express your answer in meters per second squared. ? m/s?
- 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.Consider the figure shown in the following figure. You are loweringtwo boxes, one on top of the other, down a ramp by pulling on a ropeparallel to the surface of the ramp. Both blocks move with constantvelocity of 10.0 [m/s]. The coefficient of kinetic friction between theramp and the lower box is 0.555 and the coefficient of static frictionbetween the two boxes is 0.750. A. Draw the Free-Body diagram of both blocks. Set the ?-axis parallel to the ramp. B. Write Newton’s 2nd law along the ? and ? directions for both blocks considering their state of motion (accelerations). C. What are the magnitude and direction of the frictional force on the upper box? D. What is the magnitude of the applied force? E. Determine the angle at which the top block will start to slide down the bottom block.A sled is on a horizontal surface and a rope with tension T is pulling on it at an angle e above the horizontal. The sled had mass M and does not move due to the frictional force. In this case the coefficient of friction is ug. In terms of the variables given and g, what is the magnitude of the frictional force in this case? Select one: O a. Tcose O b. H, Mgsin0 Ос. Tsin® O d. H, Mgcose