Question

In the figure, two particles, each with mass *m* = 0.86
kg, are fastened to each other, and to a rotation axis at
*O*, by two thin rods, each with length *d* = 5.4 cm
and mass *M* = 1.2 kg. The combination rotates around the
rotation axis with angular speed *ω* = 0.33 rad/s. Measured
about *O*, what is the combination's **(a)**
rotational inertia and **(b)** kinetic energy?

Answer #1

Two particles, each with mass m = 4.3 g, are fastened to each
other and to a rotation axis at P, by two thin rods, each with
length L = 0.72 m and a mass of 8.5 g, as shown. The combination
rotates around the rotation axis with an angular velocity of 10.6
rad/s. Find the rotational inertia of the combination about P?
22.90 kg*m^2 Incorrecto. Tries 3/40 Intentos Anteriores What is the
kinetic energy associated with the rotation about...

Rigid rods of negligible mass lying along the y axis
connect three particles. The system rotates about the x
axis with an angular speed of 3.20 rad/s.
An x y plane is shown. Three particles are all
connected to each other by two rigid rods that are along the
y-axis. The 4.00 kg particle is located at y =
3.00 m. The 2.00 kg particle is located at y = −2.00 m.
The 3.00 kg mass is located at y...

A student sits on a freely rotating stool holding two dumbbells,
each of mass 2.98 kg. When his arms are extended horizontally, the
dumbbells are 0.94 m from the axis of rotation and the student
rotates with an angular speed of 0.752 rad/s. The moment of inertia
of the student plus stool is 2.79 kg · m2 and is assumed to be
constant. The student pulls the dumbbells inward horizontally to a
position 0.308 m from the rotation axis.
(a)...

A ceiling fan consists of a small cylindrical disk with 5 thin
rods coming from the center. The disk has mass md = 3 kg
and radius R = 0.24 m. The rods each have mass mr = 1.2
kg and length L = 0.72 m.
1)
What is the moment of inertia of each rod about the axis of
rotation?
kg-m2
2)
What is the moment of inertia of the disk about the axis of
rotation?
kg-m2
3)
What...

A student sits on a freely rotating stool holding two weights,
each of mass 2.93 kg. When his arms are extended horizontally, the
weights are 1.10 m from the axis of rotation and he rotates with an
angular speed of 0.754 rad/s. The moment of inertia of the student
plus stool is 2.93 kg·m2 and is assumed to be constant.
The student pulls the weights inward horizontally to a position
0.296 m from the rotation axis.
(a) Find the new...

A student sits on a freely rotating stool holding two dumbbells,
each of mass 2.91 kg (see figure below). When his arms are extended
horizontally (Figure a), the dumbbells are 1.03 m from the axis of
rotation and the student rotates with an angular speed of 0.758
rad/s. The moment of inertia of the student plus stool is 2.61 kg ·
m2 and is assumed to be constant. The student pulls the
dumbbells inward horizontally to a position 0.297 m...

The figure shows a rigid assembly of a thin hoop (of mass m =
0.14 kg and radius R = 0.11 m) and a thin radial rod (of length L =
2R and also of mass m = 0.14 kg). The assembly is upright, but we
nudge it so that it rotates around a horizontal axis in the plane
of the rod and hoop, through the lower end of the rod. Assuming
that the energy given to the assembly in...

The figure shows a rigid assembly of a thin hoop (of mass m =
0.23 kg and radius R = 0.16 m) and a thin radial rod (of length L =
2R and also of mass m = 0.23 kg). The assembly is upright, but we
nudge it so that it rotates around a horizontal axis in the plane
of the rod and hoop, through the lower end of the rod. Assuming
that the energy given to the assembly in...

In the figure, a 6.67 g bullet is fired into a 0.376 kg block
attached to the end of a 0.320 m nonuniform rod of mass 0.407 kg.
The block-rod-bullet system then rotates in the plane of the
figure, about a fixed axis at A. The rotational inertia of
the rod alone about A is 0.0986 kg·m2. Treat
the block as a particle. (a) What then is the
rotational inertia of the block-rod-bullet system about point
A? (b) If the...

In the figure, a 8.32 g bullet is fired into a 0.457 kg block
attached to the end of a 0.433 m nonuniform rod of mass 0.448 kg.
The block-rod-bullet system then rotates in the plane of the
figure, about a fixed axis at A. The rotational inertia of
the rod alone about A is 0.0629 kg·m2. Treat
the block as a particle. (a) What then is the
rotational inertia of the block-rod-bullet system about point
A? (b) If the...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 12 minutes ago

asked 26 minutes ago

asked 36 minutes ago

asked 48 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago