Category Archives:
Essay Writing Help

The carbide tips of the cutting teeth The carbide tips of the cutting teeth of a circular saw are 8.6 cm from the axis of rotation. (a) The no-load speed of the saw, when it is not cutting anything, is 4800 rev/min. Why is its no-load power output negligible? (b) While the saw is cutting […]

The body in Figure is pivoted at O, and two forces act on it The body in Figure is pivoted at O, and two forces act on it as shown. If r1 = 1.30 m, r2 = 2.15 m, F1 = 4.20 N F2 = 4.90 N, ?1 = 75.0째, and ?2 = 60.0째, what […]

The blades in a blender rotate at a rate of The blades in a blender rotate at a rate of 6500 rpm. When the motor is turned off during operation, the blades slow to rest in 3.0s. What is the angular acceleration as the blades slow down? Is this the question you were looking for? […]

Three objects of uniform density—a solid sphere, Three objects of uniform density—a solid sphere, a solid cylinder, and a hollow cylinder—are placed at the top of an incline (Fig. Q10.24). They are all released from rest at the same elevation and roll without slipping. Which object reaches the bottom first? Which reaches it last? Try […]

Tracey and Corey are doing intensive research on theoretical bat Tracey and Corey are doing intensive research on theoretical baton-twirling. Each is using ?oThe Beast?? as a model baton: two uniform spheres, each of mass 500 g and radius 5 cm, mounted at the ends of a 30-cm uniform rod of mass 60 g (Figure). […]

Two point masses m1 and m2 are separated by a Two point masses m1 and m2 are separated by a massless rod of length L. (a) Write an expression for the moment of inertia about an axis perpendicular to the rod and passing through it at a distance x from mass m1. (b) Calculate dI/dx […]

The top in Figure P10.42 has a moment of inertia of 4.00 x 10 -4 kg ·m 2 and is initially at rest. The top in Figure P10.42 has a moment of inertia of 4.00 x 10-4 kg ·m2 and is initially at rest. It is free to rotate about the stationary axis AA’. A string, wrapped […]

The angular speed of an automobile engine is increased at The angular speed of an automobile engine is increased at a constant rate from 1200 rev/min to 3000 rev/min in 12 s. (a) What is its angular acceleration in revolutions per minute squared? (b) How many revolutions does the engine make during this 12 s […]

Two point masses m1 and m2 are connected by a massless rod of Two point masses m1 and m2 are connected by a massless rod of length L to form a dumbbell that rotates about its center of mass with angular velocity ω. Show that the ratio of kinetic energies of the masses is K1 […]

Two objects are attached to ropes that are attached to wheels Two objects are attached to ropes that are attached to wheels on a common axle as shown in Figure. The total moment of inertia of the two wheels is 40 kg?m2. The radii of the wheels are R1 = 1.2 m and R2 = […]