The effort required to lift a load W on a screw jack with helix angle a and angle of friction<="" div=""> Wtan(a + <)>) Wtan(a-<)>) Wsin(a + <(>) Wcos(a + ) TRUE ANSWER : ? YOUR ANSWER : ?
A number of forces acting at a point will be in equilibrium if Two resolved parts in two directions at right angles are equal All of them are inclined equally Sum of resolved parts in any two perpendicular directions are both zero Their total sum is zero TRUE ANSWER : ? YOUR ANSWER : ?
Two non-collinear parallel equal forces acting in opposite direction constitute a couple constitute a moment constitute a moment of couple balance each other TRUE ANSWER : ? YOUR ANSWER : ?
Effect of a force on a body depends upon direction magnitude All of the listed here position or line of action TRUE ANSWER : ? YOUR ANSWER : ?
Least force required to draw a body up the inclined plane is W sin (plane inclination + friction angle) applied in the direction along the plane vertically horizontally at an angle equal to the angle of friction to the inclined plane TRUE ANSWER : ? YOUR ANSWER : ?
Forces are called concurrent when their lines of action meet in plane perpendicular planes two points one point TRUE ANSWER : ? YOUR ANSWER : ?
A pair of smith’s tongs is an example of the lever of third order second order first order zeioth order TRUE ANSWER : ? YOUR ANSWER : ?
The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is double same half four times TRUE ANSWER : ? YOUR ANSWER : ?
According to principle of transmissibility of forces, the effect of a force upon a body is Minimum when it acts at the C.G. of the body Maximum when it acts at the center of gravity of a body Different at different points in its line of action The same at every point in its line of action TRUE ANSWER : ? YOUR ANSWER : ?