Homework Statement
A uniform rectangular wood block of mass M, with length b and height a, rests on an incline as shown. The incline and the wood block have a coefficient of static friction, μs. The incline is moved upwards from an angle of zero through an angle θ. At some critical angle the...
Homework Statement
Two identical objects of mass m are placed at either end of a spring of spring constant k and the whole system is placed on a horizontal frictionless surface. At what angular frequency ω does the system oscillate?
Homework Equations
ω=√(k/m)
The Attempt at a...
Homework Statement
The apparatus in the diagram consists of a solid cylinder of radius 1 cm attached at the center to two disks of radius 2 cm. It is placed on a surface where it can roll, but will not slip. A thread is wound around the central cylinder. When the thread is pulled at the angle...
Homework Statement
An angler hangs a 4.50-kg fish from a vertical steel wire and 5*10^-3 cm^2 in cross-section area. The upper end of the wire is securely fastened to a support.
a) Calculate the amount the wire is stretched by the hanging fish.
The angler now applies a force F to the fish...
Homework Statement
A 180-g wood block is firmly attached to a light horizontal spring, Fig. 6-26. The block can slide along a table where the coefficient of friction is 0.30. A force of 20 N compresses the string 18 cm. If the spring is released from this position, how far beyond its...
Homework Statement
A cyclist intends to cycle up a 14-degree inclined hill whose vertical height is 120 m. Assuming the mass of bicycle plus person is 75 kg
a) Calculate how much work is done against gravity
b) A complete revolution of the pedals moves the bike 5.10 m along its path...
Homework Statement
A machine part consists of a thin 35.1-cm-long bar with small 1.81-kg masses fastened by screws to its ends. The screws can support a maximum force of 70.3 N without pulling out. This bar rotates about an axis perpendicular to it at its center.
Homework Equations...
A long, thin metal (massless) bar is rotating in a circle at constant velocity, perpendicular to the axis of rotation. A weight is placed on the end of the bar such that there is no vertical movement of the weight or bar. What force counteracts the force of gravity on the weight?.