Strength of Materials The effort required to lift a load W on a screw jack with helix angle a and angle of friction Wcos(a + ) Wtan(a + <)>) Wsin(a + <(>) Wtan(a-<)>) Wcos(a + ) Wtan(a + <)>) Wsin(a + <(>) Wtan(a-<)>) ANSWER DOWNLOAD EXAMIANS APP
Strength of Materials The coefficient of friction depends on strength of surfaces nature of surface shape of surfaces area of contact strength of surfaces nature of surface shape of surfaces area of contact 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 same less more may be less of more depending on nature of surfaces and velocity same less more ANSWER DOWNLOAD EXAMIANS APP
Strength of Materials From a circular plate of diameter 6 cm is cut out a circle whose diameter is a radius of the plate. Find the e.g. of the remainder from the center of circular plate 0.5 cm 2.5 cm 1.0 cm 1.5 cm 0.5 cm 2.5 cm 1.0 cm 1.5 cm ANSWER DOWNLOAD EXAMIANS APP
Strength of Materials According to principle of moments positive and negative couples can be balanced if a system of coplanar forces is in equilibrium, then their algebraic sum is zero if a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero the algebraic sum of the moments of any two forces about any point is equal to moment of theiwesultant about the same point positive and negative couples can be balanced if a system of coplanar forces is in equilibrium, then their algebraic sum is zero if a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero the algebraic sum of the moments of any two forces about any point is equal to moment of theiwesultant about the same point ANSWER DOWNLOAD EXAMIANS APP
Strength of Materials A sample of metal weighs 219 gms in air, 180 gms in water, 120 gms in an unknown fluid. Then which is correct statement about density of metal density of metal can’t be determined metal will float in water metal is twice as dense as water metal is twice as dense as unknown fluid density of metal can’t be determined metal will float in water metal is twice as dense as water metal is twice as dense as unknown fluid ANSWER DOWNLOAD EXAMIANS APP
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