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-<)>) Wcos(a + ) Wtan(a + <)>) Wsin(a + <(>) Wtan(a-<)>) Wcos(a + ) Wtan(a + <)>) Wsin(a + <(>) ANSWER DOWNLOAD EXAMIANS APP
Strength of Materials In actual machines mechanical advantage is less than velocity ratio mechanical advantage is unity mechanical advantage is equal to velocity ratio mechanical advantage is greater than velocity ratio mechanical advantage is less than velocity ratio mechanical advantage is unity mechanical advantage is equal to velocity ratio mechanical advantage is greater than velocity ratio ANSWER DOWNLOAD EXAMIANS APP
Strength of Materials A heavy ladder resting on floor and against a vertical wall may not be in equilibrium, if the floor and wall both are rough sur-faces the floor is smooth, the wall is rough the floor is rough, the wall is smooth the floor and wall both are smooth surfaces the floor and wall both are rough sur-faces the floor is smooth, the wall is rough the floor is rough, the wall is smooth the floor and wall both are smooth surfaces ANSWER DOWNLOAD EXAMIANS APP
Strength of Materials The C.G. of a right circular solid cone of height h lies at the following distance from the base h/6 h/2 h/4 J/3 h/6 h/2 h/4 J/3 ANSWER DOWNLOAD EXAMIANS APP
Strength of Materials According to principle of moments if a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero if a system of coplanar forces is in equilibrium, then their algebraic sum 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 the algebraic sum of their moments about any point in their plane is zero if a system of coplanar forces is in equilibrium, then their algebraic sum 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 ANSWER DOWNLOAD EXAMIANS APP
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