1.25 m a.
A Charpy with a 50 kg pendulum of impact
machine is released from rest when 0 = 0
Radius of gyration ka = 1.75 m
What is the work done by external forces
in taking the pendulum to a new position
of O= 90°
b. Calculate the mass moment of inertia
about A
What is the angular velocity of pendulum
when 0= 90°. Please use the principle of
work and energy for your calculations.
C.

Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.