A small object of mass m moves in a horizontal circle of radius r on a...
A small object of mass m moves in a horizontal circle of radius r on a rough table. It is attached to a horizontal string fixed at the center of the circle. The speed of the object is initially v0. After completing one full trip around the circle, the speed of the object is 0.5v0.
(a) Find the energy dissipated by friction during that one
revolution in terms of m, v0, and
r. (Use any variable or symbol stated above along with the
following as necessary: g.)
ΔEtherm =
(b) What is the coefficient of kinetic friction? (Use any variable
or symbol stated above along with the following as necessary:
g.)
μk =
(c) How many more revolutions will the object make before coming to
rest?
revolutions
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A small object of mass m moves in a horizontal circle
of radius r on a...
A small object of mass m1 moves in a circular path
A small object of mass m1 moves in a circular path of radius r on a frictionless horizontal tabletop. It is attached to a string that passes through a frictionless hole in the center of the table. A second object with a mass of m2 is attached to the other end of the string. Derive an expression for r in terms of m1, m2, and the time T for one revolution. (Use any variable or symbol stated above along with the...
A particle of mass m moves in a circle of radius R at a constant speed...
A particle of mass m moves in a circle of radius
R at a constant speed v, as shown below. The
motion begins at point Q at time t = 0. Determine
the angular momentum of the particle about the axis perpendicular
to the page through point P as a function of time. (Use
any variable or symbol stated above along with the following as
necessary: t.)
A uniform solld disk of radius R and mass M is free to rotate on a...
A uniform solld disk of radius R and mass M is free to rotate on a frictionless plvot through a point on its rim (see figure below). The disk is released from rest In the position shown by the Pivot (a) What is the speed of its center of mass when the disk reaches the position indicated by the dashed circle? (Use any variable or symbol stated above along with the following as necessary: g) (b) What is the speed...
A metal rod of mass m carrying a current I glides on two horizontal rails a...
A metal rod of mass m carrying a current I glides on two horizontal rails a distance d apart. If the coefficient of kinetic friction between the rod and rails is μk, what vertical magnetic field is required to keep the rod moving at a constant speed? (Use any variable or symbol stated above along with the following as necessary: g.) B=
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An electron with charge −e and mass m moves in a circular orbit of radius r around a nucleus of charge Ze, where Z is the atomic number of the nucleus. Ignore the gravitational force between the electron and the nucleus. Find an expression in terms of these quantities for the speed of the electron in this orbit. (Use any variable or symbol stated above along with the following as necessary: k for Coulomb's constant.) v = ?
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An object of mass m moves in a vertical circle of radius R at a constant speed v. The work done by the centripetal force as the object moves from the top to the bottom of the circle is: A. mgR B. 1/2*mv^2 C. 2mgR D. 0 E. mgR+1/2*mv^2
Just need part b please and thank you A smooth cube of mass m and edge...
Just need part b please and thank you
A smooth cube of mass m and edge length r slides with speed v on a horizontal surface with negligible friction. The cube then moves up a smooth incline that makes an angle theta with the horizontal. A cylinder of mass m and radius r rolls without slipping with its center of mass moving with speed v and encounters an incline of the same angle of inclination but with sufficient friction that...
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A wad of sticky clay of mass m is hurled horizontally at a wooden block of mass M initially at rest on a horizontal surface. The clay sticks to the block. After impact, the block slides a distance d before coming to rest. If the coefficient of friction between the block and the surface is μ, what was the speed of the clay immediately before impact? (Use any variable or symbol stated above along with the following as necessary: g.)...
A rod of length L and negligible mass is attached to a uniform disk of mass M and radius R (see figure below).
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Consider a cylindrical turntable whose mass is M and radius is R, turning with an initial...
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A particle of mass m moves in a circle of radius
R at a constant speed v, as shown below. The
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the angular momentum of the particle about the axis perpendicular
to the page through point P as a function of time. (Use
any variable or symbol stated above along with the following as
necessary: t.)
A uniform solld disk of radius R and mass M is free to rotate on a frictionless plvot through a point on its rim (see figure below). The disk is released from rest In the position shown by the Pivot (a) What is the speed of its center of mass when the disk reaches the position indicated by the dashed circle? (Use any variable or symbol stated above along with the following as necessary: g) (b) What is the speed...
Just need part b please and thank you
A smooth cube of mass m and edge length r slides with speed v on a horizontal surface with negligible friction. The cube then moves up a smooth incline that makes an angle theta with the horizontal. A cylinder of mass m and radius r rolls without slipping with its center of mass moving with speed v and encounters an incline of the same angle of inclination but with sufficient friction that...
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