Onejoule is equal to 0.1 N-m 1 N-m 10 N-m 100 N-m

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1 N-m

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3. The centre of gravity of a right circular solid cone is at a distance of __________ from its base, measured along the vertical axis.(where h = Height of a right circular solid cone.)
Options
A. h/2
B. h/3
C. h/4
D. h/6

5. A block ot mass 20 kg lying on a rough horizontal plane is connected by a light string passing over a smooth pulley to another mass 5 kg, which can move freely in the Vertical direction, as shown in the below figure. The tension in the string will __________ with the increase in coefficient of friction.
Options
A. increase
B. decrease
C. not be effected

6. One end of a helical spring is fixed while the other end carries the load W which moves with simple harmonic motion. The frequency of motion is given by(where ? = Deflection of the spring.)
Options
A.
B.
C.
D.

7. Varingon's theorem of moments states that if a number of coplaner forces acting on a particle are in equilibrium, then
Options
A. their algebraic sum is zero
B. their lines of action are at equal distances
C. the algebraic sum of their moments about any point in their plane is zero
D. the algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point.

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