Dynamics

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Two blocks, of masses *m*_{A} = 0.35 kg and *m*_{B} = 1.15 kg, are on a frictionles
horizontal surface, the blocks are connected by a rope with negligible mass. A horizontal force of constant
magnitude equal to 15 N is applied by pulling the two blocks. Find the magnitude acceleration acquired by the
system and the tension in the rope connecting the blocks.

An Atwood machine has masses, of *m*_{A} = 6.25 kg and *m*_{B} = 6.75 kg, connected
by a weightless cord, through a pulley frictionless. Find:

a) The acceleration of the system;

b) The tension in the rope connecting the masses;

c) The tension in the rope that holds the system to the ceiling.

Assume the free-fall acceleration*g* = 10 m/s^{2}.

a) The acceleration of the system;

b) The tension in the rope connecting the masses;

c) The tension in the rope that holds the system to the ceiling.

Assume the free-fall acceleration

In the system of the figure, the body *A* slides on a horizontal surface without friction, dragged by body
*B* that moves downward. Bodies *A* and *B* are attached by a rope of negligible mass parallel to the
surface and passing through a frictionless pulley of negligible mass. The masses of *A* and *B* are respectively
32 kg and 8 kg. Find the acceleration of the system and the tension on the cord. Assume
*g* = 10 m/s^{2}.

In the system of the figure, the body *B* slides on a horizontal surface without friction, it is connected through
by ropes and pulleys, lightweight and frictionless, with two bodies *A* and *C* that move vertically. The
masses of *A*, *B*, and *C* are, respectively, 5 kg, 2 kg and 3 kg. Find the acceleration of the system
and the tension in the cord. Assume *g* = 10 m/s^{2}.

In an Atwood machine, the two bodies at rest on a horizontal surface, are connected by a cord, of negligible mass,
that passes over a frictionless pulley of negligible mass. The masses weight *m*_{A} = 24 kg and
*m*_{B} = 40 kg and the free-fall acceleration *g* = 10 m/s^{2}.
Find body accelerations when:

a)*F* = 400 N;

b)*F* = 720 N;

c)*F* = 1200 N.

a)

b)

c)

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Fisicaexe - Physics Solved Problems by Elcio Brandani Mondadori is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License .