The center of gravity of a quadrant of a circle lies along its central radius (r) at a distance of 0.5 r 0.6 r 0.8 r 0.7 r TRUE ANSWER : ? YOUR ANSWER : ?
The impact between two lead spheres is approximately equal to an __________ impact. Solid Inelastic Elastic None of these TRUE ANSWER : ? YOUR ANSWER : ?
The angular velocity (in rad/s) of a body rotating at N revolutions per minute is 2πN/180 2πN/60 πN/60 πN/180 TRUE ANSWER : ? YOUR ANSWER : ?
If u₁ and u₂ are the velocities of two moving bodies in the same direction before impact and v₁ and v₂ are their velocities after impact, then coefficient of restitution is given by (v₁ - v₂)/(u₁ - u₂) (u₁ - u₂)/(v₁ - v₂) (v₂ - v₁)/(u₁ - u₂) (u₂ + u₁)/(v₂ + v₁) TRUE ANSWER : ? YOUR ANSWER : ?
A redundant frame is also called __________ frame. None of these Perfect Deficient Imperfect TRUE ANSWER : ? YOUR ANSWER : ?
In a screw jack, the effort required to lower the load is __________ the effort required to raise the same load. Equal to Less than More than None of these TRUE ANSWER : ? YOUR ANSWER : ?
The maximum efficiency of a screw jack is (1 - tanφ)/(1 + tanφ) (1 - sinφ)/(1 + sinφ) (1 + tanφ)/(1 - tanφ) (1 + sinφ)/(1 - sinφ) TRUE ANSWER : ? YOUR ANSWER : ?
The forces, which meet at one point and their lines of action also lie on the same plane, are known as Coplanar concurrent forces Non-coplanar non-concurrent forces Non-coplanar concurrent forces Coplanar non-concurrent forces TRUE ANSWER : ? YOUR ANSWER : ?
The maximum frictional force which comes into play when a body just begins to slide over another surface is called Kinematic friction Rolling friction Sliding friction Limiting friction TRUE ANSWER : ? YOUR ANSWER : ?