The moment of inertia of a hollow circular section whose external diameter is 8 cm and interial diameter is 6 cm about the axis passing through its centre is
A.33.4 cm4
B.66.8 cm4
C.137.5 cm4
D.275 cm4
E.550 cm4
Category: Applied Mechanics Mcqs
A block A is dropped down a smooth inclined plane, while another identical block B is released for free fall from the same height
A.both will hit the ground simultaneously
B.block A will have higher velocity than block B while hitting the ground
C.block A will hit the ground earlier
D.block B will hit the ground earlier.
The excape velocity on the surface of the earth is
A.1 km/s
B.2.2 km/s
C.4.4 km/s
D.5.6 km/s
E.11.2 km/s
The moment of a force
A.Occurs about a point
B.Measures the capacity to do useful work
C.Occurs only when bodies are in motion
D.Measures the ability to produce turning or twisting about an axes
E.None of the above
The main advantage of using worm gears is
A.Low power loss
B.High velocity ratio
C.Ease of manufacture
D.Minimum cost
E.All of the above
If the distance to electric train is given by Fr = a + bv + cv2 In this equation constant c is likely to cover
A.air resistance
B.frictional resistance
C.flange resistance
D.track resistance
