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A box contains machinery that can rotate. The total mass of the box plus the machinery...
A box contains machinery that can rotate. The total mass of the box plus the machinery...
A box contains machinery that can rotate. The total mass of the box plus the machinery is m= 8 kg. A string wound around the machinery comes out through a small hole in the top of the box. Initially the box sits on the ground, and the machinery inside is not rotating (left side of the figure below). Then you pull upward on the string with a force of constant magnitude F= 133 N. At an instant when you have...
A cylinder with moment of inertia I about its center of mass, mass m, and radius r has a string wrapped around it whi...
A cylinder with moment of inertia I about its center of mass, mass
m, and radius r has a string wrapped around it which is tied to the
ceiling (Figure 1) . The cylinder's vertical position as a function
of time is y(t).At time t=0 the cylinder is released from rest at a height h above
the ground.Part
BIn similar problems involving rotating bodies, you will often also
need the relationship between angular acceleration, ?, and linear acceleration, a. Find...
A string is wrapped around a disk of mass m = 1.8 kg and radius R...
A string is wrapped around a disk of mass m = 1.8 kg and radius R = 0.10 m. Starting from rest, you pull the string with a constant force F = 7 N along a nearly frictionless surface. At the instant when the center of the disk has moved a distance x = 0.14 m, your hand has moved a distance of d = 0.33 m. Two pucks, one pulled from the center, the other by a string wrapped...
To increase the effect of rotation, figure skaters pull their arms in when they spin Consider...
To increase the effect of rotation, figure skaters pull their arms in when they spin Consider a figure skater with moment of inertia with her arms outstretched of I_i = 3.6kgm^2, and I_f = 1.1kgm^2 with her arms pulled in. She starts out spinning at omega_i = 0.85_s^-1 with her arms outstretched. Find omega_f. the skater's rotational velocity after she pulls her arms in. Find the increase in her rotational kinetic energy. Where does this extra energy come from? Problem...
A cylinder of radius 0.40 m and a mass of 12 kg has a string wound around it. The string is pulled off perpendicular to the radius, so that it doesn't slip while spooling off the cylinder, ma...
A cylinder of radius 0.40 m and a mass of 12 kg has a string wound around it. The string is pulled off perpendicular to the radius, so that it doesn't slip while spooling off the cylinder, making the cylinder rotate around an axis through its center with a rotational acceleration of 0.60 rad/s. (The formula for the moment of rotational inertia for the cylinder in this situation is I-% mr, where "m" is the mass and "t" is the...
Question 4 25 pts A box of mass of 3 Kg is attached to a spring...
Question 4 25 pts A box of mass of 3 Kg is attached to a spring with spring constant of 20 N/m. A force F= 5N is applied to pull the spring right. 1. Draw the diagram and label it correctly. 2. How much does the spring stretch? 3. What is the elastic potential energy stored in the spring after it is pulled out. 4. Assuming, surface is frictionless, What will be the speed with which box moves past its...
A solid disk with mass M (1.00 kg) and radius R (0.200 m) is sitting on...
A solid disk with mass M (1.00 kg)
and radius R (0.200 m) is sitting on a frictionless surface. We
analyzed the situation at left below, where a force F (2.00 N) is
applied for four seconds, by a string that has been wrapped around
the outer surface of a cylindrical disk.
Two students are debating the
following question. ‘The same force is applied for the same amount
of time, but this time by a string attached to the edge...
Fall I- 2017 Exam2-GeneralPhysics」 00 5 of 6 problems,A 6" problem will count towards extra credit,...
Fall I- 2017 Exam2-GeneralPhysics」 00 5 of 6 problems,A 6" problem will count towards extra credit, 1. Conservation of Linear Momentum gure 1. A pendulum of string length 20 cm and bob mass of 1 kg at its end, starts from rest. The pendulum -on with a block of mass 2 kg, initially at rest. The collision is swings down a quarter of a circle and collides head elastic. Neglect the mass of the string. (a) Find the speed of...
5. A diatomic molecule (like H2) can be modeled as two atoms of equal mass m,...
5. A diatomic molecule (like H2) can be modeled as two atoms of equal mass m, connected by a rigid massless rod of length a. The system is free to rotate in 3-D. I claim the moment of inertia of this molecule around its ceater of mass is a. (Feel free to convince yourself that factor of k is coect!) Big hint if you 're having trouble getting started: this problem is directly related to McIntyre's Ch A) The energy...
1 hold a 20.0 kg box 1.50 meters above the floor for a time of 15.0...
1 hold a 20.0 kg box 1.50 meters above the floor for a time of 15.0 seconds. The weight of the box is 196 N. How much work do I do on the box? A) 294 Joules B) 30.0 Joules C) 19.6 Joules D) 0 Joules 11) In order to do work on an object A) the object must move. B) it is necessary that friction be present. C) the force doing the work must be directed perpendicular to the...
A box contains machinery that can rotate. The total mass of the box plus the machinery is m= 8 kg. A string wound around the machinery comes out through a small hole in the top of the box. Initially the box sits on the ground, and the machinery inside is not rotating (left side of the figure below). Then you pull upward on the string with a force of constant magnitude F= 133 N. At an instant when you have...
A cylinder with moment of inertia I about its center of mass, mass
m, and radius r has a string wrapped around it which is tied to the
ceiling (Figure 1) . The cylinder's vertical position as a function
of time is y(t).At time t=0 the cylinder is released from rest at a height h above
the ground.Part
BIn similar problems involving rotating bodies, you will often also
need the relationship between angular acceleration, ?, and linear acceleration, a. Find...
To increase the effect of rotation, figure skaters pull their arms in when they spin Consider a figure skater with moment of inertia with her arms outstretched of I_i = 3.6kgm^2, and I_f = 1.1kgm^2 with her arms pulled in. She starts out spinning at omega_i = 0.85_s^-1 with her arms outstretched. Find omega_f. the skater's rotational velocity after she pulls her arms in. Find the increase in her rotational kinetic energy. Where does this extra energy come from? Problem...
A cylinder of radius 0.40 m and a mass of 12 kg has a string wound around it. The string is pulled off perpendicular to the radius, so that it doesn't slip while spooling off the cylinder, making the cylinder rotate around an axis through its center with a rotational acceleration of 0.60 rad/s. (The formula for the moment of rotational inertia for the cylinder in this situation is I-% mr, where "m" is the mass and "t" is the...
Question 4 25 pts A box of mass of 3 Kg is attached to a spring with spring constant of 20 N/m. A force F= 5N is applied to pull the spring right. 1. Draw the diagram and label it correctly. 2. How much does the spring stretch? 3. What is the elastic potential energy stored in the spring after it is pulled out. 4. Assuming, surface is frictionless, What will be the speed with which box moves past its...
A solid disk with mass M (1.00 kg)
and radius R (0.200 m) is sitting on a frictionless surface. We
analyzed the situation at left below, where a force F (2.00 N) is
applied for four seconds, by a string that has been wrapped around
the outer surface of a cylindrical disk.
Two students are debating the
following question. ‘The same force is applied for the same amount
of time, but this time by a string attached to the edge...
Fall I- 2017 Exam2-GeneralPhysics」 00 5 of 6 problems,A 6" problem will count towards extra credit, 1. Conservation of Linear Momentum gure 1. A pendulum of string length 20 cm and bob mass of 1 kg at its end, starts from rest. The pendulum -on with a block of mass 2 kg, initially at rest. The collision is swings down a quarter of a circle and collides head elastic. Neglect the mass of the string. (a) Find the speed of...
5. A diatomic molecule (like H2) can be modeled as two atoms of equal mass m, connected by a rigid massless rod of length a. The system is free to rotate in 3-D. I claim the moment of inertia of this molecule around its ceater of mass is a. (Feel free to convince yourself that factor of k is coect!) Big hint if you 're having trouble getting started: this problem is directly related to McIntyre's Ch A) The energy...
1 hold a 20.0 kg box 1.50 meters above the floor for a time of 15.0 seconds. The weight of the box is 196 N. How much work do I do on the box? A) 294 Joules B) 30.0 Joules C) 19.6 Joules D) 0 Joules 11) In order to do work on an object A) the object must move. B) it is necessary that friction be present. C) the force doing the work must be directed perpendicular to the...
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