A themodynamic system is taken from an initial state Xalongthe path XYZX as shown in the PV diagram For the process Xâ Y ÎU is greater than zero andis Q greater or less than 0 Is W greater or less than or equal to 0 Explain For the process Y â Z, Q is greater than zero and Is W greater than, equal to or less than 0 andisÎU greater than , less than or equal to zero ?

OneClass: A themodynamic system is taken from an initial state Xalongthe path XYZX as shown in the PV...

Object A collides on a horizontal frictionless surface with an initially stationary target, object X. The initial and final velocities of object A are shown. The final velocity of object X is not given.

a). At an instant during the collision, is the net force on object A zero or non-zero?

b) [During the collision, is the momentum of object A conserved? Explain. Is the momentum of the system consisting of objects A and X conserved? Explain. On the same horizontal surface, object C collides with an initially stationary target, object Z. The initial speeds of objects C and A are the same, and m_x = m_z > m_A = m_c. After the collisions, object C moves in the direction shown and has the same final speed as object A. In the space below, copy the vectors v_C1 and v_cr with their tails together. Use these vectors to draw the change in velocity vector for glider C, Delta v_c. Is the magnitude of the change in velocity vector of object A greater than, less than, or equal to the magnitude of the change in velocity vector of object C? Explain? Is the magnitude of the change in the momentum vector of object A greater than, less than, or equal to the magnitude of the change in the momentum vector of object C? Explain? Is the final speed of object X greater than, less than, or equal to the final speed of object Z? Explain. Consider the following incorrect statement: Gliders A and C have some change in momentum. They have the same mass, and because they have the same initial speed and same final speed. Delta-v is the same for each of.them." Discuss the error(s) in the reasoning.

sangriaporcupine175

Part A.

Blocks A, B, and C are pushed across a frictionless table by a hand that exerts a constant horizontal force. Block A has mass 2M block B has mass 3M and block C has mass M.

a) Draw separate free-body diagrams for each of the three blocks. Clearly label the forces. in the spaces below, draw vectors to represent the net force on each block.
b) Draw the vectors with correct relative magnitudes.

Part B.

Blocks A and B are at rest on a level, frictionless surface. Block B is attached to an ideal massless spring of constant k, which is initially at its equilibrium length. Block B has greater mass than block A (m_B > m_A).

During the interval from t₁ to t₂ a hand pushes block A to the left with a constant force of magnitude F₀, compressing the spring a distance as shown. At time t₂, both blocks again have a speed of zero.

Consider system A consisting of block A and system BS consisting of block B and the spring.

c) During the interval from t₁ to t₂, is the absolute value of the net work done on system BS by external forces, greater than, less than, or equal to that done on system A by external forces?

At some later time, the hand is holding the blocks at rest with the spring compressed a distance d₀. At time t₃ the hand releases the blocks. At time t₄, the spring returns to its equilibrium length and both blocks have speed v_f, as shown.

Consider the interval from t₃ to t₄:

d) Is the change in kinetic energy of system BS greater than, less than, or equal to that of system A?
e) Is the change in total energy of system BS positive, negative, or zero?

apricotoyster628

c) During the interval from t₁ to t₂, is the absolute value of the net work done on system BS by external forces, greater than, less than, or equal to that done on system A by external forces?

At some later time, the hand is holding the blocks at rest with the spring compressed a distance d₀. At time t₃ the hand releases the blocks. At time t₄, the spring returns to its equilibrium length and both blocks have speed v_f, as shown.

Consider the interval from t₃ to t₄:

d) Is the change in kinetic energy of system BS greater than, less than, or equal to that of system A?
e) Is the change in total energy of system BS positive, negative, or zero?

magentahound999

Related textbook solutions

Physics: Principles with Applications

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Part B.

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