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49 questions

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Question 21

jamb 2003

A 90cm uniform lever has a load of 30N suspended at 15cm from one of its ends. If the fulcrum is at the center of gravity, the force that must be applied at its other end to keep it in horizontal equilibrium is

A15N

B20N

C30N

D60N

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Question 22

jamb 2003

A piece of stone attached to one end of a string is whirled round in a horizontal circle and the string suddenly cuts. The stone will fly off in a direction

Aperpendicular to the circular path

Bparallel to the circular path

Ctangential to the circular path

Dtowards the center of the circle

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Question 23

jamb 2003

The stylus of a phonograph record exerts a force of 7.7 x 10\(^{-2}\)N on a groove of radius 10\(^{-5}\)m. Compute the pressure exerted by the stylus on the groove

A2.45 x 10⁸ Nm^-2

B3.45 x 10⁸ Nm^-2

C4.90 x 10⁸ Nm^-2

D2.42 x 10⁸ Nm^-2

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Question 24

jamb 2003

Water does not drop through an open umbrella of silk materials unless the inside of the umbrella is touched. This is due to

Acapilarity

Bosmotic pressure

Cviscosity

Dsurface tension

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Question 25

jamb 2003

If an object just begins to slide on a surface inclined at 30^o to the horizontal,the coefficient of friction is

A√3

B^√3/₂

C¹/_√2

D¹/_√3

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Question 26

jamb 2003

A hose of cross-sectional area 0.5m² is used to discharge water from a water tanker at a velocity of 60ms^-1 in 20s into a container. If the container is filled completely, the volume of the container is

A240m³

B600m ³

C2400m ³

D6000m³

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Question 27

jamb 2003

The length of piece of glass block was measured by means of a vernier calliper as shown above. The length of the glass block is

A1.63 cm

B1.64 cm

C1.65 cm

D1. 66 cm

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Question 28

jamb 2003

A test tube of radius 1.0cm is loaded to 8.8g. If is placed upright in water, find the depth to which it would sink

A2.8cm

B5.2cm

C25.5cm

D28.0cm

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Question 29

jamb 2003

On top of a spiral spring of the force constant 500Nm^-1 is placed a mass of 5 x 10^-3 kg. If the spring is compressed downwards by a length of 0.02m and then released, calculate the height to which the mass is projected

A8 m

B4 m

C2 m

D1 m

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