Strength of Materials The effort required to lift a load W on a screw jack with helix angle a and angle of friction Wtan(a + <)>) Wtan(a-<)>) Wsin(a + <(>) Wcos(a + ) Wtan(a + <)>) Wtan(a-<)>) Wsin(a + <(>) Wcos(a + ) ANSWER DOWNLOAD EXAMIANS APP
Strength of Materials A body of weight W on inclined plane of a being pulled up by a horizontal force P will be on the point of motion up the plane when P is equal to W Wtan(a + <|)) W sin (a + $) Wan(a-) W Wtan(a + <|)) W sin (a + $) Wan(a-) ANSWER DOWNLOAD EXAMIANS APP
Strength of Materials Dynamic friction as compared to static friction is may be less of more depending on nature of surfaces and velocity more less same may be less of more depending on nature of surfaces and velocity more less same ANSWER DOWNLOAD EXAMIANS APP
Strength of Materials Center of percussion is point of suspension the point of C.G. the point of metacentre the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis point of suspension the point of C.G. the point of metacentre the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis ANSWER DOWNLOAD EXAMIANS APP
Strength of Materials 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 10 kg, - ve sense 10 kg, + ve sense 20 kg, + ve sense 20 kg, - ve sense 10 kg, - ve sense 10 kg, + ve sense 20 kg, + ve sense 20 kg, - ve sense ANSWER DOWNLOAD EXAMIANS APP
Strength of Materials The center of gravity of a uniform lamina lies at the mid point of its axis the center of heavy portion the bottom surface All of these the mid point of its axis the center of heavy portion the bottom surface All of these ANSWER DOWNLOAD EXAMIANS APP
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