Related Questions

If the ratios of all the corresponding linear dimensions are equal, then the model and the prototype are said to have
A Geometric similarity
B Kinematic similarity
C Dynamic similarity
D None of these
To determine whether one object is the prototype of (or is part of the prototype chain of) another object, one should use the
A isPrototypeOf() method
B equals() method
C === operator
D none of the mentioned
Three forces acting on a rigid body are represented in magnitude, direction and line of action by the three sides of a triangle taken in order. The forces are equivalent to a couple whose moment is equal to
A Area of the triangle
B Twice the area of the triangle
C Half the area of the triangle
D None of these
If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is
A 30°
B 60°
C 90°
D 120°
A Jar contains white, red and green marbles in the ratios 2: 3: 4. Five more green balls are added to the Jar and the ratios become 2: 3: 5. How many white balls are there in the Jar?
A 4
B 6
C 8
D 10
Two circular dials of exactly the same size are mounted on a wall side by side in such a way that their perimeters touch at one point. Dial 1, which is on the left , spins clockwise around its center , and dial 2 , which is on the right spins counter clockwise around its center . (Assume that there is no friction at the point of contact between the dials.) Each dial is marked on its perimeter at three points that are at equale distances around the points arked ondial 1 are N, O, and P and the points marked on dial 2 are X, Y, and Z. If points O and Z are just meeting at the point of contact between the dials , and if dial 1 spins at the same speed as dial 2, what is the smallest number of revolutions of each dial that will bring O and Z together again?
A 1
B 2
C 3
D 4
Kinematic similarity is said to exist between the model and the prototype, if both of them
A Have identical velocities
B Are equal in size and shape
C Are identical in shape, but differ only in size
D Have identical forces
Dynamic similarity is said to exist between the model and the prototype, if both of them
A Have identical velocities
B Are equal in size and shape
C Are identical in shape, but differ only in size
D None of the above
Geometric similarity is said to exist between the model and the prototype, if both of them
A Have identical velocities
B Are equal in size and shape
C Are identical in shape, but differ only in size
D Have identical forces
Parallelogram Law of Forces states, "if two forces acting simultaneously on a particle be represented in magnitude and direction by two adjacent sides of a parallelogram, their resultant may be represented in magnitude and direction by
A Its longer side
B Its shorter side
C The diagonal of the parallelogram which does not pass through the point of intersection of the forces
D The diagonal of the parallelogram which passes through the point of intersection of the forces

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