Friction A force of 28.0 N is required to start a 3.4 kg box moving across a horizontal concrete floor. (a) What is the coefficient of static friction between the box and the floor? (b) If the 28.0 N force continues, the box accelerates at 0.50 m/s2. What is the coefficient of kinetic friction? 4) A box is at rest on the floor when you begin pushing on it with a 40 N force. Let the mass be 20 kg, the coefficient of static friction be 0.18, and the coefficient of kinetic friction be 0.11. Does the box move? What is the acceleration? 5) A 250.0 kg crate is being pushed across the floor at a constant speed with a rope that makes an angle of 22.0 to the horizontal. If the force applied is equal to 875 N, what is the coefficient of kinetic friction? 875 N 22.0° 250.0 kg

Q: What is the cross product A x B? Find the x component. Find the y component.

A:

Q: The figure below shows three blue-and-gold macaws (Ara ararauna) which are members of the large…

A: Mass of the macaws m1=0.8 kg m2=0.95 kg m3=1.2 kg Weight of the branch (W)=46 N θ1=25o  θ2=47.5o…

Q: Four forces (1, 2, 3, and 4) are in the x-y plane and act on an irregularly shaped object, as shown.…

A: The magnitude of the net torque about the z-axis is 13.5 Nm.

Q: or some reason, a dart gun (mass = 1.50 kg) is hanging from a very long string attached to the…

A:

Q: A person pushing a uniformly-loaded 51.2 kg wheelbarrow of length L with pushing force P is…

A: Normal force exerted by the wheel is, N=W2=mg2=51.2 kg9.8 m/s22=250.88 N

Q: A racetrack has the shape of an inverted cone, as the drawing shows. On this surface the cars race…

A: The speed of the car is: The angle of the inclined surface is:

Q: This figure shows a person preparing to do a pushup. Calculate the back extensor force (Fm) required…

A:

Q: 6. A tetherball of mass 3 kg is suspended from a rope of length 5.0 m and travels a circle of radius…

A:

Q: An object set on top of a tripod is supported by the tripod. Assume that the tripod's legs meet at…

A: Given, An object set on top of a tripod is supported by the tripod. The position of the tripod's…

Q: It is not possible to see very small objects, such as viruses, using an ordinary light microscope.…

A: Given:- the xy plane with initial velocity vi =v i . As it passes through the region x=0 to x=d, the…

Q: In the pulley system shown in the figure, the masses of the blocks are mi and m2. The pulleys and…

A: Assume the tension in the string as shown in figure, For the pulley P3, (which is assumed…

Q: A 89 gram coin sits on a horizontally rotating turntable. The turntable makes 1.1 revolution each…

A: Given data The mass of the coin is m = 89 g The number of revolutions made by the turntable is θ =…

Q: In 1956, Frank Lloyd Wright proposed the construction of a mile-high building in Chicago. Suppose…

A: Given data: w=746 N Need to determine the change in weight.

Q: 2. Given the following points, what is resultant of the two forces: a 5ÖÖN force directed along a…

A:

Q: Consider the vectors shown above. What is the cross product ? -180 m2 k 144 m2 k 103 m2 -103 m2 k…

A:

Q: VA roller-coaster vehicle has a mass of 500 kg when fully loaded with passengers (Fig. P7.32). (a)…

A:

Q: 11. Given the following points, what is x-component of a 20ON force directed along a line connecting…

A: Point A = (1, 0, -1) Point C = (2, -1, 0) F = 200 N

Q: A skate park is formed by two semicircles of radius R1 = 8.3 m and R2 = 1.0 m and a flat central…

A: Given  R1 = 8.3 m  R2 = 1.0 m length of flat part  = L = 3.6 m. The semicircles are tangent to the…

Q: Force 1 is supposed to be {100.0 grams · g, 60.0o} and Force 2 is supposed to be {200.0 grams · g,…

A:

Q: A toy car is rolling down the ramp as shown in the figure. The car's mass is m 1.2 kg and the ramp…

A: Given, Mass, m =1.2 kg  θ =16°

Q: A weight of 800 N is suspended at a height of 6 meters above the ground. Julia, an acrobat weighing…

A: Given data:  Weight (W1) = m1g = 800 N Height (h1) = 6 m Weight (W2) = m2g = 600 N Required: Height…

Q: To get a toolbox up an inclined slope, a student installs a pulley system as in the picture shown.…

A:

Q: A long straight wire and a rectangular loop lie in the same plane, as shown in the the figure above,…

A:

Q: the forces on the beam are replaced by an equivalent Force-Position system, determine the distance d…

A:

Q: Static Friction Force Revisited Now let's go back and consider the static situation again. Let the…

A: Static friction fs  = μ Ν  Hence we can calculate static friction by finding the value of N.

Q: Two people (a child and parent) are sitting on a teeter-totter of length L = 3 m and mass m = 10 kg.…

A:

Q: on the top of the roof. The roof is pitched such that it rises for every 12 inches of horizontal…

A:

Q: You are working in an ice skating rink and have been asked to hang a new banner on the wall. Your…

A: Given: The value of angle is θ=34.4∘. The value of external angle is ϕ=26.144∘. The horizontal…

Q: Learning Goal: Two forces act on a point as shown in (Eigure 1). The magnitudes of the forces are F₁…

A: The direction angle between the force and the y-axis is given by the formula, β'=cos-1FyF…

Q: A skateboarder is attempting to make a circular arc of radius r = 11 m in a parking lot. The total…

A: When the skater slides there is only kinetic friction accelerating him radially.

Q: c. A. (F+ 2C) d. A. (2F+C) 2. Find the angle between the following pairs of vectors: a. A = -3.0 -…

A:

Q: a) What is the magnitude of the acceleration of each block? b) How much time would I take for the…

A: Newton's Second law of motion According to Newton's Second Law of motion, the rate of change of…

Q: A desperate hiker has to think fast to help his friend who has fallen below him. Quickly, he ties a…

A:

Q: What is the magnitude of all three ropes' tension

A: Step 1:Length is 2mMass is 28kgForce is 685NDistance is 0.5mAngle is 40oStep 2:From the free body…

Q: A big boulder has a mass of 8.20t (metric tons) and rests at a coal mine site. The boulder is blown…

A:

Q: A 520 g model rocket is on a cart that is rolling to the right at a speed of 2.0 m/s. The rocket…

A: Given: Mass of rocket =520 g =520×10-3 kg Horizontal initial speed = 2.0 m/s Vertical thrust/Force =…

Q: A 560 g model rocket is on a cart that is rolling to the right at a speed of 3.0 m/s. The rocket…

A:

Q: Two boxes ma=11.8 kg and mb are connected by a light string that passes over a frictionless pulley…

A:

Q: Problem#5 1. Compute the magnitude of the resultant R of the force system shown below. 2. Compute…

A:

Q: A: Given the vectors a=i-2 j+3k and b=-2i+3j-k, show that the cross product ax b is orthogonal to…

A: Two vectors are orthogonal to each other if the dot product between them is equal to zero. i.e,…

Q: 1.0m 3.0m 0.5m mi m, PA N, 5. The drawing above shows two objects on a board supported at two…

A: Given, M1 = 40 kg M2 = 20 kg M3 = 10 kg  We know g = 9.8 m/s2

Q: Find for the Cross Product of the following pairs of vectors. 1. A=4i-5j +8k, B = -2i+ 3j + 3k 2. C…

A:

Q: The pulley in the figure and the rope that connects the two blocks are ideal. The mass of body 2 is…

A:

Q: Lizzy is training on the trapeze when a slight accident occurs. As a result, she is now hanging from…

A:

Q: For the mechanism shown below, compute the magnitude of the force (F) required to break contact at…

A: Given s = 10 mm K = 1800 N/m Compute the magnitude of the force (F) required to break contact at…

Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.