Question

You have a horizontal grindstone (a disk) that is 86 kg, has a 0.38 m radius, is turning at 88 rpm (in the positive direction), and you press a steel axe against the edge with a force of 18 N in the radial direction.

Assuming that the kinetic coefficient of friction between steel
and stone is 0.20, calculate the angular acceleration of the
grindstone in rad/s^{2}.

What is the number of turns, N, that the stone will make before coming to rest?

Answer #1

You have a grindstone (a disk) that is 91.0 kg, has a 0.370-m
radius, and is turning at 68.0 rpm, and you press a steel axe
against it with a radial force of 11.0 N.
(a)
Assuming the kinetic coefficient of friction between steel and
stone is 0.50, calculate the angular acceleration (in
rad/s2) of the grindstone. (Indicate the direction with
the sign of your answer.)
_____rad/s2
(b)
How many turns (in rev) will the stone make before coming to...

A grindstone of mass m = 50.0 kg is a solid disk 0.480 m in
diameter. You press an ax down on the rim with a normal force of F
= 155 N The coefficient of kinetic friction between the blade and
the stone is 0.50, and there is a constant friction torque of 6.5
Nm between the axle of the stone and its bearings.
(a) While you are pressing the ax against the rim, how much
force would your...

A 65.0-kg grindstone is a solid disk 0.550m in diameter. You
press an ax down on the rim with a normal force of 150N (Figure 1)
. The coefficient of kinetic friction between the blade and the
stone is 0.60, and there is a constant friction torque of 6.50N?m
between the axle of the stone and its bearings.
Part A
How much force must be applied tangentially at the end of a
crank handle 0.500 m long to bring the...

Suppose you exert a force of 212 N tangential to a 0.215 m
radius 75.0 kg grindstone (a solid disk). (Give your answers to at
least 2 decimal places.)
(a)
What torque (in N · m) is exerted? (Enter the magnitude.)
N · m
(b)
What is the angular acceleration (in rad/s2) assuming
negligible opposing friction? (Enter the magnitude.)
rad/s2
(c)
What is the angular acceleration (in rad/s2) if there
is an opposing frictional force of 20.6 N exerted 1.75...

A potter’s wheel, a thick stone disk of radius 0.500 m and mass
100 kg, is freely rotating at 70.0 rev/min. The potter can stop the
wheel by pressing a wet rag against the rim and exerting a radially
inward force of 35.0 N. If the applied force slows the wheel down
with an angular acceleration of 0.875rad/s2 , calculate the torque
acting on the wheel and the coefficient of kinetic friction between
the wheel and the rag

A disk with mass m = 10.3 kg and radius R = 0.34 m begins at
rest and accelerates uniformly for t = 16.8 s, to a final angular
speed of ω = 26 rad/s.
1)
What is the angular acceleration of the disk?
rad/s2
2)
What is the angular displacement over the 16.8 s?
rad
3)
What is the moment of inertia of the disk?
kg-m2
4)
What is the change in rotational energy of the disk?
J
5)...

A uniform disk with mass m = 9.07 kg and radius R = 1.36 m lies
in the x-y plane and centered at the origin. Three forces act in
the +y-direction on the disk: 1) a force 313 N at the edge of the
disk on the +x-axis, 2) a force 313 N at the edge of the disk on
the –y-axis, and 3) a force 313 N acts at the edge of the disk at
an angle θ =...

Point Pis on the rim of a large
Spinning Disk of mass 10.0 kg and radius 2.58 m.
At time t=0.00 s the disk has an angular velocity of 4.00 rad/s and
rotates counterclockwise about its center O, and
Pis on the x-axis. A net applied CW torque of 20.0
m-N causes the wheel to undergo a uniform angular acceleration. The
magnitude of the total acceleration (m/s2) at point
Pwhen t = 15.0 s is? The angular velocity of the...

A uniform disk with mass m = 9.11 kg and radius R = 1.37 m lies
in the x-y plane and centered at the origin. Three forces act in
the +y-direction on the disk:
1) a force 319 N at the edge of the disk on the +x-axis, 2) a
force 319 N at the edge of the disk on the –y-axis, and 3) a force
319 N acts at the edge of the disk at an angle θ =...

Radius of the middle disk of the 3-step
pulley r = _0.0166_ ( m
) You need this value to calculate the torque applied to
the combination of the connected disk and the ring using a string
with a mass hanging at the other end.
Angular acceleration data for the Aluminum disk and the black
ring combined.
Mass m of the brass discs and the plastic mass hanger combined (
kg )
m = 0.025 kg
m = 0.045 kg
m =...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 10 minutes ago

asked 10 minutes ago

asked 38 minutes ago

asked 52 minutes ago

asked 1 hour 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