Related Questions

All good athletes wants to win, and all athletes who want to win eat a well balanced diet : therefore, all athletes who do not eat a well balanced diet are bad athletes. Which of the following, if true, would most weaken the assumptions of the argument above?
A Sara wants to win, but she is not a good athlete.
B All the players of the national cricket team eat a well balanced diet.
C No athlete who does not eat a well balanced diet wants to win.
D Karim, the star cricketer, does not eat a well balanced diet, but he is a good athlete
When two shafts of same length, one of which is hollow, transmit equal torques and have equal maximum stress, then they should have equal
A Polar moment of inertia
B Polar modulus
C Diameter
D Angle of twist
Operating torques in analogue instruments are
A deflecting and control
B deflecting and damping
C deflecting, control and damping
D vibration and balancing
If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is
A 30°
B 60°
C 90°
D 120°
The change in length due to a tensile or compressive force acting on a body is given by (where P = Tensile or compressive force acting on the body, $$l$$ = Original length of the body, A = Cross-sectional area of the body and E = Young's modulus for the material of the body)
A $$\frac{{{\text{P}}l{\text{A}}}}{{\text{E}}}$$
B $$\frac{{{\text{P}}l}}{{{\text{AE}}}}$$
C $$\frac{{\text{E}}}{{{\text{P}}l{\text{A}}}}$$
D $$\frac{{{\text{AE}}}}{{{\text{P}}l}}$$
If a given force (or a given system of forces) acting on a body __________ the position of the body, but keeps it in equilibrium, then its effect is to produce internal stress in the body.
A Change
B Does not change
C Changes periodically
D None of these
Three forces acting on a rigid body are represented in magnitude, direction and line of action by the three sides of a triangle taken in order. The forces are equivalent to a couple whose moment is equal to
A Area of the triangle
B Twice the area of the triangle
C Half the area of the triangle
D None of these
Three forces which act on a rigid body to keep it in equilibrium. The forces must be coplanar and
A Concurrent
B Parallel
C Concurrent parallel
D None of these
A survey was conducted among the students of Khulna University to find out how many forms of physical exercise usually swam, 25% said they usually did jogging, 20% said they played cricket, 15% said they usually played football and 20 respondents said they did not take any form of exercise. From the above findings it can be concluded that.
A The student of khulna University do not usually take physical exercise.
B No respondent took more than one form of exercise.
C The method of data collection was not valid.
D Some of the respondents took more than one form of exercise.
When a body is subjected to two equal and opposite forces, acting tangentially across the resisting section, as a result of which the body tends to shear off across the section, the stress and strain induced is
A Tensile stress, tensile strain
B Compressive stress, compressive strain
C Shear stress, tensile strain
D Shear stress, shear strain

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