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Following is the sequence of activities for conceptual development of 3-D shapes. They are in random sequence. (i) Comparing two shapes and identifying the similarities and differences (ii) Constructing 3-D shapes with play-dough (iii) Making shapes using nets (iv) Constructing shapes using geometrical tools such as compass, ruler Which of the following represents the correct order of sequence?
Which of the following is NOT true about Frictional force? A. Friction is the force which opposes the relative motion of two surfaces in contact. B. The force of friction that acts when a body is moving (sliding) on a surface is called sliding friction. C. Friction in machines wastes energy and also causes wear and tear. D. Rolling friction is much more than sliding friction, the use of ball bearings in a machine considerably reduces friction.
The total drag is a sum of the skin drag and the pressure drag. Which among of the following options, states the correct formula for skin drag and pressure drag? (Here µ stands for dynamic viscosity of fluid, D stands for diameter of the sphere and U stands for velocity of flow of fluid.)
When pressure drag over a body is large as compared to the friction drag, then the shape of the body is that of
An elementary school mathematics teacher decides to make a 'unit plan' on “Geometrical Shapes”. He writes the following expected learning outcomes.  (i) Recognize various shapes (ii) Differentiate between various shapes (iii) Identify sides, angles and vertices of shapes Which of the following levels of Van Hiele's geometric reasoning is he assessing his students on?
Which of the following statements is/are true regarding teaching 'shapes' at the primary level? 1. Shapes should be introduced using real life examples. 2. Shapes should be taught using several example in their surroundings. 3. Shapes can not be taught at primary level.
Consider the following statements: 1. The kinetic friction is always less than the rolling friction. 2. The kinetic friction is always equal to the rolling friction. 3. The kinetic friction is always greater than the rolling friction. Which of the following statement is correct?
Advantages of Casting are: (I) Can create complex part geometries, 3-D shapes (II) Can create both external and internal shapes and large hollow shapes (III) It is a near net shape process for small to large parts (IV) Very good mechanical strength can be obtained for as-cast component
While discussing about friction, a teacher gave a number of examples to explain the concept. Some of the examples where friction is useful in our day-to-day life as quoted by the teacher are given below : A. We are able to write because of friction between the tip of the pen and the paper. B. We are able to walk because of friction between our feet and the ground. C. A ball thrown vertically upwards comes back to us due to friction. D. We are able to stop a moving vehicle by applying brakes because of friction. The correct examples were
Bluff body is the body of such a shape that pressure drag as compared to friction drag is