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4

One Newton force, is

A. 103 dynes

B. 104 dynes

C. 105 dynes

D. 106 dynes

Correct Answer :

C. 105 dynes


Related Questions

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4

A train weighing 196 tonnes experiences a frictional resistance of 5 11/22 per tonne. The speed of the train at the top of a down gradient 1 in 78.4 is 36 km/hour. The speed of the train after running 1 km down the slope, is

A. 5 √10 m/sec

B. 10 √5 m/sec

C. 5 √3 m/sec

D. 3 √5 m/sec

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4

The total kinetic energy of a hoop of mass 2 kg and radius 4 m sliding with linear velocity 8 m/sec and angular velocity 5 radian/sec is

A. 64 J

B. 400 J

C. 464 J

D. 89 J

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4

Which of the following represents the state of neutral equilibrium?

A. A cube resting on one edge

B. A smooth cylinder lying on a curved surface

C. A smooth cylinder lying on a convex surface

D. None of the above

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4

The member which does not carry zero force in the structure shown in below figure, is

A. ED

B. DC

C. BC

D. BD

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4

A ball of mass 250 g moving on a smooth horizontal table with a velocity of 10 m/sec hits an identical stationary ball B on the table. If the impact is perfectly plastic, the velocity of the ball B just after impact would be

A. Zero

B. 5 m/sec

C. 10 m/sec

D. None of these

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4

When a circular wheel rolls on a straight track, then the shape of body centrode and space centrode respectively are

A. Straight line and parabola

B. Straight line and circle

C. Circle and straight line

D. Circle and parabola

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4

If the angle of projection is double the angle of inclination (α) of the plane on which particle is projected, the ratio of times of flight up the inclined plane and down the inclined plane, will be

A. ½ cos α

B. ½ sin α

C. ½ tan α

D. 2 cos α

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4

The load shared by the member BC of the structure shown in below figure is

A. 23 t

B. 32 t

C. 4 t

D. 3 t

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4

The tension in a cable supporting a lift

A. Is more when the lift is moving downwards

B. Is less when the lift is moving upwards

C. Remains constant whether its moves downwards or upwards

D. Is less when the lift is moving downwards

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4

If the angular distance, 0 = 2t3 - 3t², the angular acceleration at t = 1 sec. is

A. 1 rad/sec²

B. 4 rad/sec²

C. 6 rad/sec²

D. 12 rad/sec²

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4

If a body is lying on a plane whose inclination with the horizontal is less than the angle of friction, then? (i) A force is required to move the body upwards (ii) A force is required to move the body downward (iii) The body will not be in equilibrium The correct answer is

A. Only (i)

B. Only (ii)

C. Both (i) and (ii)

D. Both (i) and (iii)

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4

If a set of given forces are such that their free vectors build a closed polygon, then

A. The resultant force and resultant couple are always zero

B. The resultant force is zero but resultant couple is not zero

C. The resultant force is zero but resultant couple may not be zero

D. The resultant force and resultant couple both may not be zero

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4

If the radius of the earth is 600 km the height of a mountain above sea level at the top of which a beat seconds pendulum at sea level, looses 27 seconds a day, is

A. 500 metres

B. 1000 metres

C. 1500 metres

D. 2000 metres

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4

In case of S.H.M. the period of oscillation (T), is given by

A. T = 2ω/π²

B. T = 2π/ω

C. T = 2/ω

D. T = π/2ω

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4

The C.G. of a hemisphere from its base measured along the vertical radius is at a distance of

A. 4R/3π

B. 3R/8

C. 3πR/4

D. 8R/3

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4

Pick up the incorrect statement from the following. In a simple harmonic motion

A. Velocity is maximum at its mean position

B. Velocity is minimum at the end of the stroke

C. Acceleration is minimum at the end of the stroke

D. Acceleration is zero at the mean position

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4

The direction of projection should bisect the angle between the inclined plane and the vertical for a range of a projectile on inclined plane

A. To be zero

B. To be maximum

C. To be minimum

D. None of these

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4

A vehicle weighing w kg is to run on a circular curve of radius r. If the height of its centre of gravity above the road level is h and the distance between the centres of wheels is 2a, the maximum velocity, in order to avoid over turning, will be

A. gra/h

B. √(gra/h)

C. 3√(gra/h)

D. 4√(gra/h)

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4

If the linear velocity of a point on the rim of a wheel of 10 m diameter, is 50 m/sec, its angular velocity will be

A. 20 rad/sec

B. 15 rad/sec

C. 10 rad/sec

D. 5 rad/sec

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4

To attain the synchronous orbit, the launch of a satellite, is done from a place

A. On equator

B. On 30° latitude

C. On 45° latitude

D. On the poles

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4

The gravitational force makes a satellite go round the earth in a circular orbit, if it is projected with an initial velocity of

A. 8.04 km/sec at a height of 285 km

B. 11.11 km/sec at a height of 37,400 km

C. 11.26 km/sec, the satellite escapes the pull of the earth

D. All the above

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4

Two circular discs of same weight and thickness are made from metals having different densities. Which disc will have the larger rotational inertia about its central axis?

A. Disc with larger density

B. Disc with smaller density

C. Both discs will have same rotational inertia

D. None of the above

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4

The total time of collision and restitution of two bodies, is called

A. Time of collision

B. Period of collision

C. Period of impact

D. All the above

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4

A 50 kg boy climbs up a 8 m rope in gymnasium in 10 sec. The average power developed by the boy is approximately

A. 400 watts

B. 500 watts

C. 4000 watts

D. None of these

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4

For a simple pendulum, the period of one oscillation is

A. 2π √(l/2g)

B. 2π √(2g/l)

C. 2π √(l/g)

D. 2π √(g/2l)

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4

A rigid body is in a stable equilibrium if the application of any force

A. Can raise the CG of the body but cannot lower it

B. Tends to lower the CG of the body

C. Neither raises nor lowers the CG of the body

D. None of above

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4

The ratio of the speed of a rolling cylinder to the speed of sliding cylinder is

A. Less than 1

B. Equal to 1

C. Between 1 and 2

D. Greater than 2

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4

Principle of Transmissibility of Forces states that, when a force acts upon a body, its effect is

A. Maximum if it acts at the centre of gravity of the body

B. Different at different points on its line of

C. Same at every point on its line of action

D. Minimum if it acts at the C.G. of the body

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4

An ordinate in a funicular polygon represents

A. Shear force

B. Resultant force

C. Bending moment

D. Equilibrium

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4

The apparent weight of a man in a moving lift is less than his real weight when it is going down with

A. Uniform speed

B. An acceleration

C. Linear momentum

D. Retardation