A framed structure is perfect if it contains members equal to (where n = number of joints in a frame) n-l n-2 2n-3 2n-l TRUE ANSWER : ? YOUR ANSWER : ?
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 20 kg, – ve sense 10 kg, + ve sense 20 kg, + ve sense TRUE ANSWER : ? YOUR ANSWER : ?
A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to 250 25 100 50 TRUE ANSWER : ? YOUR ANSWER : ?
The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is as per the principle of independence of forces resolution of forces. balance of force forces TRUE ANSWER : ? YOUR ANSWER : ?
The necessary condition for forces to be in equilibrium is that these should be All be equal Coplanar Coplanar & Meet at one point Meet at one point TRUE ANSWER : ? YOUR ANSWER : ?
The center of gravity of a triangle lies at the point of Concurrence of the medians Intersection of bisector of angles Intersection of diagonals Intersection of its altitudes TRUE ANSWER : ? YOUR ANSWER : ?
In ideal 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 TRUE ANSWER : ? YOUR ANSWER : ?
The magnitude of two forces, which when acting at right angle produce resultant force of VlOkg and when acting at 60° produce resultant of Vl3 kg. These forces are V5 and V5 2 and 5 2 and V6 3 and 1 kg TRUE ANSWER : ? YOUR ANSWER : ?
The weight of a body is due to centripetal force of earth force of attraction experienced by par-ticles gravitational pull exerted by the earth gravitational force of attraction towards the centre of the earth. TRUE ANSWER : ? YOUR ANSWER : ?
The coefficient of friction depends on nature of surface strength of surfaces area of contact shape of surfaces TRUE ANSWER : ? YOUR ANSWER : ?