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Engineering Mechanics

On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be___________________?

Engineering Mechanics /
On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be___________________?

A. towards the wall at its upper end
B. away from the wall at its upper end
C. upwards at its upper end
D. downwards at its upper end
E. none of the above

On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be___________________? Read More »

Engineering Mechanics

In detennining stresses in frames by methods of sections, the frame is divided into two parts by an imaginary section drawn in such a way as not to cut more than____________________?

Engineering Mechanics /
In detennining stresses in frames by methods of sections, the frame is divided into two parts by an imaginary section drawn in such a way as not to cut more than____________________?

A. two members with unknown forces of the frame
B. three members with unknown forces of the frame
C. four members with unknown forces of the frame
D. three members with known forces of the frame
E. four members with two known forces

In detennining stresses in frames by methods of sections, the frame is divided into two parts by an imaginary section drawn in such a way as not to cut more than____________________? Read More »

Engineering Mechanics

Angle of friction is the_______________________?

Engineering Mechanics /
Angle of friction is the_______________________?

A. angle between normal reaction and the resultant of normal reaction and the limiting friction
B. ratio of limiting friction and normal reaction
C. the ratio of minimum friction force to the friction force acting when the body is just about to move
D. the ratio of minimum friction force to friction force acting when the body is in motion
E. ratio of static and dynamic friction

Angle of friction is the_______________________? Read More »

Engineering Mechanics

If a suspended body is struck at the center of percussion, then the pressure on die axis passing through the point of suspension will be_________________?

Engineering Mechanics /
If a suspended body is struck at the center of percussion, then the pressure on die axis passing through the point of suspension will be_________________?

A. maximum
B. minimum
C. zero
D. infinity
E. same as the force applied

If a suspended body is struck at the center of percussion, then the pressure on die axis passing through the point of suspension will be_________________? Read More »

Engineering Mechanics

The resultant of the following three couples 20 kg force, 0.5 m arm, $ ve sense 30 kg force, 1 m arm, – ve sense 40 kg force, 0.25 m arm, + ve sense having arm of 0.5 m will be__________________?

Engineering Mechanics /
The resultant of the following three couples 20 kg force, 0.5 m arm, $ ve sense 30 kg force, 1 m arm, – ve sense 40 kg force, 0.25 m arm, + ve sense having arm of 0.5 m will be__________________?

A. 20 kg, – ve sense
B. 20 kg, + ve sense
C. 10 kg, + ve sense
D. 10 kg, – ve sense
E. 45 kg, + ve sense

The resultant of the following three couples 20 kg force, 0.5 m arm, $ ve sense 30 kg force, 1 m arm, – ve sense 40 kg force, 0.25 m arm, + ve sense having arm of 0.5 m will be__________________? Read More »

Engineering Mechanics