Math Chapter Wise

EnglishUP PGT-2016 (02-02-2019)

Q141.If two equal perfectly elastic bodies impinge directly then after impinge

ABoth interchange their velocities BBoth come to CVelocities of both do not change DNone of the above

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EnglishUP PGT-2016 (02-02-2019)

Q142.The resultant of P and Q is R. If P is reversed and Q remaining the same the new resultant becomes R'. If R is perpendicular to R', then P: Q is

A1:2 B1:1 C2:1 D2:3

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EnglishDSSSB TGT (SECTION-B) 28 DEC 2014

Q143.A stone is dropped in quiet lake and waves move in circles at the speed of 5 cms–1. At the instant when the radius of the circular wave is 8 cm, how fast is the enclosed area increasing?

A2 1/40 cm s B2 1/80 cm s C2 1/60 cm s DNone of these

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EnglishUP PGT-2016 (02-02-2019)

Q144.Which one of the following is not correct for a common catenary?

Ax /c y s ce + = B2 ds csec d = ψ ψ Cy/c sec tan e ψ + ψ = Dx s csinh c =

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EnglishPGT 2009

Q145.For the catenary y = c cosh x c

As = c sin x c By = c tan ψ Cs = c sin h x c Ds = c sec ψ

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EnglishPGT 2004

Q146.If two equal and perfectly elastic spheres impinge at right angle, then their directions after impact will be

Aat right angle Bat angle 1800 Cat acute angle DNone of these

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EnglishUP TGT-2016 (08-03-2019)

Q147.The centre of gravity of a semi-circular disc of radius 'a' is

A2a,0 π B3a,0 4 π C4a,0 3 π Da a, 2 2

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EnglishTGT 2001

Q148.A particle at rest is on a plane surface which makes an angle of 30o with the horizontal. If the particle start sliding then what will be the acceleration of the particle when the angle of plane with the horizontal is made 60o.

A2 98 m /sec 10 3 B2 98 m /sec 3 C2 49 m /sec 3 D2 49 m /sec 10 3

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EnglishTGT 2001

Q149.A particle is moving in a straight line according to the equation x = 4t3 + 2t + 5. Where 'x' in meters and 't' in seconds then what will be the average acceleration of the particle in 4th second?

A84 m/sec2 B72 m/sec2 C194 m/sec2 D110 m/sec2

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EnglishTGT 2001

Q150.A particle moving with uniform acceleration covers a distance of 20 and 60 meter in the first and second respectively. What was the initial velocity of the particle?

A0 B5 m/sec. C10 m/sec. D15 m/sec.

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EnglishTGT 1999

Q151.A body is thrown alternatively with the same velocity at two different angles. If both times the range is same and the flight of time are 't' and 't' then R =?

A2 1 tt'g B4 1 tt'g Ctt'g D8 1 tt'g

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EnglishTGT 1999

Q152.A particle moving with velocity 'V; is moving along a straight line as follows V2 = 2S2 +4S+5. What will be the acceleration of the particle at S = 5?

A10 B12 C14 D15

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EnglishTGT 1999

Q153.If the projection angle of a particle is 60o and the ratio of horizontal range & time of flight is 5: 2. What is the velocity of Projection?

A5 B10 C15 DNone o these

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EnglishPGT 2013

Q154.If a simple catenary (string) has a tension 'T' at a point 'P' and tension 'T0' at the lowest point C and the weight of the arc CP is 'W', then–

A2 2 2 0 + = T T W B2 2 2 0 − = T T W C0 + = T T W D0 − = T T W

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EnglishPGT 2013

Q155.A particle with a constant velocity 'V' makes one rotation S = 4a sinΨ Ψ Ψ, then the acceleration of the particle–

A2 2 2 v 4 a S − B2 2 2 v 16a S + C2 2 2 v 4 a S + D2 2 2 v 16a S −

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EnglishPGT 2013

Q156.If 'A' and 'B' are moving in the same direction with velocities 'u' and 'v' respectively, then the relative velocity of 'B' with respect to 'A' is–

Av–u Bu–v Cv+u Du2/+v2

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EnglishPGT 2013

Q157.A particle is thrown from a horizontal angle of 30o with a velocity of 2943 cm/sec. The flight time of the particle will be– (g = 981 cm/sec2.)

A3 2 Sec. B3 Sec. C6 Sec. D12 Sec.

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EnglishPGT 2013

Q158.If a particle is moving along the curve r = aeθ with a constant speed, then it's acceleration will be proportional to?

Ar2 Br C1/r D2 1 r

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EnglishPGT 2013

Q159.The distance of the centre of gravity of a thin hemispherical shell of radius 'a' from its center is–

A2 3 a B1 2 a C3 4 a D1 3 a

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EnglishPGT 2013

Q160.The Path of a projectile in vaccum will be–

AA circle BA ellipse CA parabola DA hyperbola

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