ENGINEERING DYNAMICS TUTORIAL 4
Assignment 3:Hand in your calculations for Questions 1, 2 & 3 (NOTE 3
QUESTIONS ARE DUE)
Question 1
The uniform 10 kg disk A has a radius of gyration of 100 mm about the y-axis and spins at a constant rate of 140 r/s. At the same time the assembly rotates counterclockwise about the Z-axis at a constant rate of 45 r/s Determine,
The acceleration of the mass center of disk A.
The gyroscopic moment exerted by the shaft at C on the disk.
y z
Z
x
Question2
A 1.5 Mg test rocket carries 6.5 Mg of fuel and stands vertical ready for liftoff. Due to a miscalculations in the design of its boosters, the fuel burns at only 150 kg/s and the relative exhaust velocity is ue=450 m/s, assume gravitational acceleration is constant g =9.81 m/s2 and determine:
The time t at which liftoff occurs.
The maximum speed that will be attained by the rocket.