Question

A rod 4ft long rotates in a horizontal plane about a vertical axis through its center. At each end of the rod is fastened a cord 3ft long. Each cord supports a weight W. Compute the speed in rpm to incline each cord at 35 degrees with the vertical. Answer in 2 decimal places.

Answer #1

A uniform wire of mass M and length d rotates in a horizontal
plane about an axis passing through its center. Two small beads,
each of mass m, are placed on the wire; friction between the beads
and the wire is negligible. The beads are initially held on the
wire by catches at a distance d/4 on either side of the center, and
the system rotates with angular speed ω0. The catches are then
released, and the beads slide outward...

A rod with a length of 80 cm is pivoted about a horizontal axis
through its center (rod's mass is negligable). A black mouse with a
mass of 0.510 kg clings to one end of the stick, and a
brown rat with a mass of 0.211 kg clings to the other
end. The system is released from rest with the rod horizontal.
Part A
If black mouse and brown rat can hold on, Find their velocities
as the rod swings through a...

A rod of length 10 m rotates about an axis perpendicular to its
length and through its center. Two particles of masses m1 = 4.0 kg
and m2 = 3.0 kg are connected to the ends of the rod. What is the
angular momentum of the system if the speed of each particle is 2.5
m/s?

a rod 2.5 m long with mass 10 kg can rotate freely about a
horizontal axis through the end of the rod.
a bullet with mass 15 grams or 0.015 kg with a speed of 400 m/s
strikes center of the rod in a direction perpendicular to the rod,
and is embedded there.
What is the rod's angular speed after the bullet stops in the
rod?

A uniform rod of mass 3.40×10−2 kg and length 0.410 m
rotates in a horizontal plane about a fixed axis through its center
and perpendicular to the rod. Two small rings, each with mass 0.190
kg , are mounted so that they can slide along the rod. They are
initially held by catches at positions a distance
5.50×10−2 m on each side from the center of the rod, and
the system is rotating at an angular velocity 28.0 rev/min ....

A uniform rod of mass 3.45×10−2 kgkg and length 0.360
mm rotates in a horizontal plane about a fixed axis through its
center and perpendicular to the rod. Two small rings, each with
mass 0.250 kgkg , are mounted so that they can slide along the rod.
They are initially held by catches at positions a distance
4.80×10−2 mm on each side from the center of the rod,
and the system is rotating at an angular velocity 28.0
rev/minrev/min ....

A rigid rod of mass 5.30 kg and length of 1.50 m rotates in a
vertical (x,y) plane about a frictionless pivot through its center.
Particles m_1 (mass=6.30 kg) and m_2 (mass=2.20 kg) are attached at
the ends of the rod. Determine the size of the angular acceleration
of the system when the rod makes an angle of 42.1° with the
horizontal.

A 54-cm-long, 500 g bar rotates in a horizontal plane on an axle
that passes through the center of the bar. Compressed air is fed in
through the axle, passes through a small hole down the length of
the bar, and escapes as air jets from holes at the ends of the bar.
The jets are perpendicular to the bar's axis. Starting from rest,
the bar spins up to an angular velocity of 200 rpm at the end of 12...

Calculate the moment of inertia of a thin rod rotating about an
axis through its center perpendicular to its long dimension. Do the
same for rotation about an axis through one of the ends
(perpendicular to the length again). Does this confirm the parallel
axis theorem? Remember ?? = ? ??C????.

A wheel 1.65 m in diameter lies in a vertical plane and rotates
about its central axis with a constant angular acceleration of 4.35
rad/s2. The wheel starts at rest at t = 0, and
the radius vector of a certain point P on the rim makes an
angle of 57.3° with the horizontal at this time. At t =
2.00 s, find the following.
(a) the angular speed of the wheel
(b) the tangential speed of the point P...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 2 minutes ago

asked 2 minutes ago

asked 11 minutes ago

asked 18 minutes ago

asked 21 minutes ago

asked 39 minutes ago

asked 39 minutes ago

asked 40 minutes ago

asked 44 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago