Box A is sliding down a 20° incline while box B is sliding down a 30° incline. The boxes are identical. Each incline is made of the same material and has the same degree of roughness. Which box will experience the greater friction force? A. Box A B. Box B C. Both will have the same friction force
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- A 0.400-kg pendulum bob passes through the lowest part of its path at a speed of 3.00 m/s. (a) What is the tension in the pendulum cable at this point if the pendulum is 80.0 cm long? (b) When the pendulum reaches its highest point, what angle does the cable make with the vertical? (c) What is the tension in the pendulum cable when the pendulum reaches its highest point?8. A factory needs to move packages from one level to another using a ramp. They want to choose a material that has a specific coefficient of friction with the packages that will be sliding down the ramp. a) What problem could occur if the coefficient of friction were too high? Your answer: O Packages would go too fast and could break at the end of the ramp. O Packages could slow down too quickly and stop before the end of the ramp. O Packages could break the ramp because gravity would increase. O Packages could bounce off the ramp because normal force would increase.A factory needs to move packages from one level to another using a ramp. They want to choose a material that has a specific coefficient of friction with the packages that will be sliding down the ramp. What problem could occur if the coefficient of friction were too high? A.Packages would go too fast and could break at the end of the ramp. B.Packages could slow down too quickly and stop before the end of the ramp. C.Packages could break the ramp because gravity would increase. D.Packages could bounce off the ramp because normal force would increase.
- A 10 kg box is on the horizontal surface with an exerting force of 95.3 N to start a box in the horizontal surface. a. Calculate the coefficient static friction. b. If the box continues to move with an acceleration of 1.71 m/s. What is the kinetic friction.AsapI watched a lot of Looney Toons when I was a kid, and liked that the Roadrunners legs would spin for a second or two before their claws caught traction. a. With a coefficient of kinetic friction 0.2 what acceleration will the roadrunner experience while their feet are sliding accross the ground? b. How far forward will the roadrunner drift in a half second, starting from rest under this acceleration? c. After catching traction the Roadrunner accelerates away, travelling 10 m to get offscreen in one fifth of a second. What was their coefficient of static friction?
- 1. Pushing a Bor Two workers are sliding a 300 kg crate across the floor. One worker pushes forward on the crate with a force of 380 N while the other pulls in the same direction with a force of 350 N using a rope connected to the crate. Both forces are horizontal, and the crate slides with a constant speed. What is the crate's coefficient of kinetic friction on the floor? 2. Fun Friction Problem A 4000 kg truck is parked on a 7.0 slope. Calculate the frictional force on the truck. 3. Rolling Friction The rolling resistance for steel on steel is a paltry = 0.002. How long would it take a 500,000 kg train to come to a stop if it was originally rolling at 10 m/s?2. A 1,480-N crate is being pushed across a level floor at a constant speed by a force F of 370 N at an angle of 20.0° below the horizontal, as shown in the figure a below. The floor has some amount of friction. 20.0° a a. Draw a free body diagram of all the forces on the crate. b. Write out one equation for the y component of the resultant force. Hint: The crate does not move in the y direction. Write out one equation for the x component of the resultant force. Hint: the crate moves in the x direction. C. d. Determine the Normal force. e. What is the coefficient of kinetic friction between the crate and the floor? (Enter vour answer to at least three decimal places.)You need to push a couch 4 m to the other side of the room. After the initial push to get it going you push on the 90kg couch with a steady horizontal force of 600 N. The coefficient of kinetic friction between the couch and the floor is 0.6. 1. What is the magnitude and direction of the frictional force on the couch? 2. What is the magnitude and direction of the net force on the couch? 3. What is the magnitude and direction of the acceleration of the couch?
- 2. A 500 g block w/ an initial speed of 90 cm/s slides (to the right) along a horizontal tabletop against a friction force of 0.80 N. a. How far will it slide before stopping? b. What is the coefficient of friction between the block & the tabletop?9. The 500KN is in contact with a 45° inline. The coefficient of static friction is 0.25. Compute the value of the horizontal force P necessary to Just start the block up the incline. A. 822KN B. 832KN C. 842KN D. 852KNSA3. A block is given an initial velocity of 5.00 m/s up a frictionless 20.0° incline. How far up the incline does the block slide before coming to rest? SA4. A man is pulling a crate along a concrete floor. This time, let's be specific. The crate has a mass of 100 kg and the man pulls with a force of 1 250 N. The coefficient of friction between the crate and the floor is 0.2. What is the acceleration of the crate? SA5. A horizontal force of 80 N is used to pull a 20 N wooden box moving toward the right along a horizontal, wood surface as shown. Calculate the magnitude of the frictional force acting on the box. Determine the magnitude of the force acting on the box. Determine the mass of the box. Calculate the magnitude of the acceleration of the box.