- Mechanics (^21)
beam (Fig. 13). The rigidity of each rod is
k 0 , and the angle between them is 2a.
Determine the rigidity k of the system of
rods relative to the vertical displacement
Fig. 13
of a hinge A under the 'action of a certain
force F, assuming that displacements are
small in comparison with the length of the
rods.
1.36. Two heavy balls are simultaneously
shot from two spring toy-guns arranged on a
horizontal plane at a distance s = 10 m
from each other. The first ball has the ini-
tial vertical velocity vi = 10 m/s, while
the second is shot at an angle a to the hori-
zontal at a velocity v 2 = 20 m/s. Each
ball experiences the action of the force of
gravity and the air drag F = ttv, p, =
0.1 Os.
Determine the angle cc at which the balls
collide in air.
1.37. A light spring of length 1 and rigidi-
ty k is placed vertically on a table. A small
ball of mass m falls on it.
Determine the height h from the surface
of the table at which the ball will have the
maximum velocity.
soomview
(soomView)
#1