Concept explainers
The coefficient of static friction is 0.60 between the two blocks in FIGURE P7.35. The coefficient of kinetic friction between the lower block and the floor is 0.20. Force <m:math display='block'>
FIGURE P7.35
Learn your wayIncludes step-by-step video
Chapter 7 Solutions
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
Additional Science Textbook Solutions
Physics for Scientists and Engineers with Modern Physics
Conceptual Physics (12th Edition)
Physics (5th Edition)
University Physics Volume 1
Cosmic Perspective Fundamentals
Lecture- Tutorials for Introductory Astronomy
- (a) A cat with a mass of 850 kg in moving to the right with a constant speed of 1.44 m/s. What is the total force on the cat ? (b) What is the total force on the cat if it is moving to the left?arrow_forwardSA3. 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.arrow_forwardA lamp hangs vertically from a cord in a descending elevator. The elevator has a deceleration of 2.4 m/ s2 before coming to a stop. A. If the tension in the cord is 89 N, what is the mass of the lamp? B. What is the tension in the cord when the elevator ascends with an upward acceleration of 2.4 m/ s2 ?arrow_forward
- A box of mass ?= 5.00 kg is at rest on a horizontal rough surface. The coefficients of static friction and kinetic friction between the surface and the box are μ?= 0.450 and μ?= 0.400, respectively. Then, a horizontal force ?⃗ is exerted on the box. a. If the magnitude of the force ?⃗ is 12.0 N, what is the magnitude of the friction force on the block? b. If the magnitude of the force ?⃗ is 25.0 N, what is the magnitude of the acceleration of the block?arrow_forwardI 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?arrow_forwardMary pushes a her sister down a hill in a cardboard box. The total mass of the box and child is 115 kg. The box starts at rest at the beginning of the incline. The hill is at an incline of 28 degrees with respect to the horizontal.The static and kinectic friction between the box and hill is ?? = 0.4 and ?? = 0.2. a. What is the magnitude of the friction force acting on the box?b. What is the magnitude of the net force acting on the box and child system?c. Will the block slide down the hill, or stay at rest?arrow_forward
- Q3. The refrigerator has a weight of 80 kg and rests on a tile floor for which u-0.25. also the man has a weight of 70 kg and the coefficient of static friction between the floor and his shoes is us=0.5. If he pushes horizontally on the refrigerator, determine if he can move it. If so. does the refrigerator slip or tip? Take g=10m/s² 1.0m 10 1.2m G 0.5m A 1.0marrow_forwardQ2. A and B are two pegs separated by 13 cm. A body of weight W is suspended from A and B using a thread of length 17 cm. Find out T1 and T2. A 5 cm T₁ W T₂ 12 cm Barrow_forwardIn the figure m = 2.0 kg. F = 10.0 N, and the coefficient of kinetic friction between the block and the surface is 0.20. What is the friction force between the block and the surface? F 30° O 3.9 N O 2.9 N 1.9 N O 4.9 Narrow_forward
- The block shown is pulled across the rough horizontal surface at a constant speed by the force shown. If m=14 kg, F=16, and 0 = 37°, what is the coefficient of kinetic friction between the block and the surface? consider g = 10 m/s2. %3D A. 0.298 B. 0.198 C. 0.09801 D. None E. 0.248arrow_forwardThe coefficient of static friction between a sled and the snow is 0.3, with a coefficient of kinetic friction of 0.2. A 500 N female sits on the 100 N sled. How much force is required to keep the sled in motion? 60 N 120 N 180 N 240 N An object has static friction of 0.3 and kinetic friction of 0.2. Which is going to be harder? To initiate the movement or keeping the object in motion? To initiate the motion To keep the motion goingarrow_forward21. A child pushes a 315 g toy truck across a horizontal rough surface. (coefficient of kinetic friction, ux = 0.73). a. Draw a formal free-body diagram of the toy truck if it is being pushed horizontally to the right. b. What total force must the child apply to push the truck at a constant speed? 22. A 1600 g tool is thrown at 15.0 m/s, 40° above the horizontal from the top of an 80.0 m building under construction. How long does it take to hit the ground? Draw a vector diagramarrow_forward
- Physics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning