A combination lock has a 1.0-cm-diameter knob that is part of the dial you turn to unlock the lock. To turn that knob, you grip it between your thumb and forefinger with a force of 0.60 N as you twist your wrist. Suppose the coefficient of static friction between the knob and your fingers is only 0.12 because some oil accidentally got onto the knob. What is the most torque you can exert on the knob without having it slip between your fingers?

Q: A grinding wheel is in the form of a uniform solid disk of radius 7.07 cm and mass 2.07 kg. It…

A: Torque=Iα where I=moment of inertia α=Angular acceleration According to rotational kinematics…

Q: The ice cream cone shown below can be approximated as follows: · scoop on top = uniform solid sphere…

A: a) moment of inertia of scoop on top = (2/5)(0.027)(0.03)2  = 0.00000972 kg m2moment of inertia of…

Q: The moment of inertia of the top shown in the figure is 6.00×10–3 kg.m2 and is initially at rest.…

A: Given data:  Moment of inertia (I) = 6.00 × 10-3 kg.m2 Tensile force (F) = 6.87 N The rope pulled…

Q: rotating body/system can be in equilibrium if   i. no angular acceleration. ii. it has constant…

A:

Q: A platform is rotating at an angular speed of 2.1 rad/s. A block is resting on this platform at a…

A: Given data: Initial angular speed of platform is, ω1=2.1 rad/s. Initial distance of block from the…

Q: A uniform rod is set up so that it can rotate about an axis at perpendicular to one of its ends. The…

A: L = 0.877 m m = 1.23 kg Initial angular velocity = 0 rad/secFinal angular velocity = 6.61 rad/sec…

Q: A wheel of radius 0.20 m is mounted on a frictionless horizontal axis. The rotational inertia of the…

A:

Q: In the figure below, what is the torque due to the tension in the cable? O 200 N X axis 2.00 m 100 N…

A:

Q: A 30-cm-diameter, 1.6 kg solid turntable rotates on a 1.6-cm-diameter, 450 g shaft at a constant 33…

A: Given values:Radius of turntable, r1 = diameter/2 = 15 cm = 0.15 mMass of turn table, m1 = 1.6…

Q: R 2h

A: heavier mass = m1Lighter mass = m2Initial seperation between two masses = 2hMoment of inertia of…

Q: An “Atwood’s machine” consists of two objects connected by a light string that passes over a pulley…

A:

Q: A 8 ?? box resting on a horizontal, frictionless surface is attached to a 2 ?? weight by a thin,…

A: Given, Mass of the box resting (m1) = 8 kg Mass of the weight (hanging) (m2) = 2kg mass of pully (M)…

Q: In the figure, the pulley has a frictionless axle. It has two grooves for the cord to wrap around:…

A: The free-body diagram is shown below.

Q: Disk 1 Disk 2

A:

Q: A constant net torque is applied to an object. Which one of the following will NOT be constant? A)…

A: Torque is given as , T = Iα      (1) From equation (1) we can say that if torque is constant that…

Q: A sphere ROLLS SMOOTHLY down the incline. What can we say for sure?  A) The normal force cancel the…

A: To determine A sphere rolls smoothly down the incline. What can we say for sure

Q: Figure below shows a rod that is free to rotate about its center of mass. A force F,= 16 N is…

A: Given, force (F1) = 16 N and angle = 60 degree. And force (F2) = 16 N and angle = 30 degree. And…

Q: Which measure would not be useful to help you determine the change in angular velocity when the…

A: There are two ways to determine the change in the angular velocity are: First way: The expression…

Q: Which of the following statements is TRUE about an object rolling without slipping down an inclined…

A:

Q: You are installing a new spark plug in your car, and the manual specifies that it be tightened to a…

A:

Q: You are installing a new spark plug in your car, and the manual specifies that it be tightened to a…

A: From the equation for torque, the force exerted on the wrench is,

Q: When a ceiling fan rotating with an angular speed of 2.65 rad/s is turned off, a frictional torque…

A: Moment of Inertia: Using relation between torque and moment of inertia we can find I, τ=Iα ⇒I=τα…

Q: A 30.0 kg door is 1.00 m wide, as shown in the diagram. A force of 85.0 N is applied is applied…

A: from newtons second law of rotation we have  τ=Iατ is torque about hingeI is moment of inertiaα…

Q: 250 g , 25-cm diameter plastic disk is spun on an axle through its center by an electric motor. What…

A: Mass of the disc, m = 250 g = 0.25 kg Diameter of the disc, d = 25 cm = 0.25 m Disc rotate from 0 to…

Q: If the torque required to loosen a nut on the wheel of a car has a magnitude of 85.0 Nm, what…

A:

Q: Disk 1 Disk 2

A: use the conservation f angular momentum  we have to solve the question

Q: You are installing a new spark plug in your car, and the manual specifies that it be tightened to a…

A: The equation of the Force can be calculated from torque as given below.

Q: Calculate the torque (in N · m) about the z-axis that is out of the page at the origin in the…

A: Given:F1 = 6.0 N, F2 = 4.3 N, F3 = 6.0 N, F4 = 4.1 N.Find the torque.

Q: The turntable of an old record player has two readings: 33 rpm and 45 rpm. Suppose that the…

A: The angular velocity of turntable of an old record player has two readings : 33 rpm and 45 rpm

Q: Consider a motor that exerts a constant torque of 25.0 N⋅m to a horizontal platform whose moment of…

A: Given,

Q: The drawing illustrates an overhead view of a door and its axis of rotation. The axis is…

A: Torque =Frsin(theta) theta = angle between line of force and plane of door. r = distance between…

Q: A top has a peg along its axis with a lightweight string wrapped around it. As shown below, the end…

A: Given in question - Tension force (F) = 5.60N                                  Moment of inertia of…

Q: In the figure below, what is the torque due to the tension in the cable? 200 N axis 2.00 m 100 N 400…

A: Torque due to tension ζ = (Tsin30°)r where Tension(T) =200N r =2m

Q: A uniform cylindrical grindstone has a mass of 10 kg and a radius of 12 cm. (a) What is the…

A: a) The expression for find rotational kinetic energy is KEr=12Iω2=12Mr222πr602 Plugging values in…

Q: A dental bracket exerts a horizontal force of 80.6 N on a tooth at point B in the figure. What is…

A: Given: F = 80.6 N r = 1.20 cm =0.012 m angle θ=48

Q: Two blocks are connected by massless string that is wrapped around a pulley. Block 1 has a mass…

A: Draw the free body diagram of the pulley and masses.

Q: 4: A young man was jumping on a diving board with a length of 2.44 meters. If the force he exerted…

A:

Q: 1a. The above seesaw has a length of 4.00 m.  It is in equilibrium with the people in places as…

A:

Q: +, F. You use a wrench to turn a rusty nut. You place your hand at where the black dot is and apply…

A: Required  torque=?

Q: Two wheels A and B in the figure are connected by a belt that does not slip. The radius of B is 4.30…

A:

Q: A ring and disc are both rolling without slipping so that both have a kinetic energy of 144. What is…

A: Given:  The kinetic energy of the ring and disc is ERing=Edisc=144 J. The total kinetic energy of…

Q: wheel has a moment of inertia of 9.0 slug ft2. What constant unbalanced torque is required to…

A: Given, moment of inertia of wheel, I = 9.0 slug ft2initial angulalr speed, ωo = 3.0 revsfinal…

Q: A string is wrapped around a thin-walled cylinder pulley of radius 11.5 cm and mass of 14 kg. If the…

A: