Applied Mechanics Mcqs Archives

A particle moves along a rough plane inclined at 30? to the horizontal. The co-efficient of friction between the particle and the plane is 0.1. Its initial velocity is 15 m/sec. The ratio of the velocity of the particle when it move down the plane to that when it move up the plane would be in the regions

August 7, 2019 BILAL KHATTAK0

A.2 ? 3
B.4 ? 6
C.5 ? 7
D.8 ? 10
E.10 ? 13

A grinding wheel rotates at 3000 rpm. When power supply is cut-off the wheel stops in 10 seconds. The number of revolutions made by the wheel before coming to rest would be

August 6, 2019 BILAL KHATTAK0

A.3000
B.1500
C.1000
D.500
E.250

The centre of gravity of a plane lamina will not be at its geometrical centre if it is a

August 6, 2019 BILAL KHATTAK0

A.Square
B.Rectangle
C.Right angled triangle
D.Equilateral triangle
E.Circle

The curve of a catenary by nature is

August 6, 2019 BILAL KHATTAK0

A.ellipse
B.circular
C.hyperbolic
D.parabolic

The angle which an inclined surface makes with the horizontal when a body placed on it is on the point moving down is known as

August 5, 2019 BILAL KHATTAK0

A.Angle of friction
B.Angle of limiting friction
C.Angle of inclination
D.Angle of repose
E.None of the above

A man is standing near the edge of a uniformly rotating platform about an axis passing through its centre. The speed of rotation of the platform will decrease if he

August 5, 2019 BILAL KHATTAK0

A.moves towards the axis of rotation
B.accepts a heavy bag from one of his friends standing near by and holds it in his hand
C.extends his arms outwards
D.jumps out from the platform

A weight of 4.9 N rests on a rough horizontal floor that has a coefficient of friction of 0.5. If g = 9.8 m/s2, the smallest horizontal force that gives the weight an acceleration of 4m/s2 is most nearly

August 5, 2019 BILAL KHATTAK0

A.2 N
B.2.5 N
C.3 N
D.4.5 N
E.4.9 N

What is the total acceleration of a point on the rim of a flywheel 4 mts in diameter 0.6 see after it has started from rest if it accelarates uniformly from rest to 2000 rpm in 20 secs.

August 4, 2019 BILAL KHATTAK0

A.33.2 mts/sec2
B.78.94 mts/sec2
C.68.9 mts/sec2
D.102.6 mts/sec2

A sphere of radius r is cut from larger sphere of radius R. The distance between their centre is a. The centroid of the remaining valoume lies on the line of centres and the sistanc from the centre of the larger sphere is

August 3, 2019 BILAL KHATTAK0

A.aR/(R – r)
B.aR/(R2-r2)
C.ar3 / (R3 – r3)
D.ar2 / (R2 – r2)

A cage weighing 200 kg is lowered down a mine shaft with uniform acceleration. In the first 5 sec the cage reaches a depth of 20 m. The tension in the cord lowering the cage would be

August 2, 2019 BILAL KHATTAK0

A.200 kg
B.167.2 kg
C.836 kg
D.41.8 kg
E.100 kg