=

17

a)
b)

C2103 Pages: 4

SET III
State D‘Alembert principle giving the equation. (3)
In a crank and connecting rod mechanismshown in Fig.8, the radius of the crank .(7)
is 300mm and the length of the rod is 1500mm. The crank is rotating at 300rpm.
Determine the following, when the crank makes an angle 40° as shown in Fig.8:
i) Velocity at point A ii) Angular velocity of the rod AC
iii) The velocity of the piston at C. 1

piston

connecting rod

Fig.8

A lift has an upward acceleration of 117/52, Find the pressure exerted by the man (10)
of 62.5kg on the floor of the lift. If the lift had a downward acceleration of 1171/52,

find the pressure exerted by the man. Also find an upward acceleration of the lift,
which would cause the man to exert a pressure of 700N.

A body of mass 500kg is suspended by two springs in series, the stiffness of (10)
springs being 60kN/m and 40kN/m. The body is pulled down from 115
equilibrium position by 50mm and released. What will be the maximum
acceleration and maximum velocity of the body? What would be the maximum

acceleration, if the springs were in parallel?
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