Home
Current Affairs January 2024

What is the correct answer?

4

On a mass m describing a circular path of radius r, the centrifugal force

A. Acts tangentially to the circular path

B. Acts towards the centre of rotation

C. Acts away from the centre of rotation

D. Is mw2r/g kgf

Correct Answer :

B. Acts towards the centre of rotation


Related Questions

What is the correct answer?

4

A body is said to move with Simple Harmonic Motion if its acceleration, is

A. Always directed away from the centre, the point of reference

B. Proportional to the square of the distance from the point of reference

C. Proportional to the distance from the point of reference and directed towards it

D. Inversely proportion to the distance from the point of reference

What is the correct answer?

4

If the velocity of projection is 4 m/sec and the angle of projection is α°, the maximum height of the projectile from a horizontal plane, is

A. u² cos² α/2g

B. u² sin² α/2g

C. u² tan² α/2g

D. u² sin 2α/2g

What is the correct answer?

4

Engineer's units of force, is

A. Newton in absolute units

B. Dyne in absolute units

C. Newton and dyne in absolute units

D. All the above

What is the correct answer?

4

The maximum pull in a cable, carrying a uniformly distributed load and supported at two ends which are at the same level, is at

A. Supports

B. Quarter span

C. Mid span

D. None of the above

What is the correct answer?

4

Joule is the unit of

A. Work

B. Force

C. Power

D. Torque

What is the correct answer?

4

A weight W is suspended at the free end of a light member hinged to a vertical wall. If the angle of inclination of the member with the upper wall is θ°, the force introduced in the member, is

A. W sec θ

B. W cos θ

C. W sin θ

D. W cosec θ

What is the correct answer?

4

At a given instant ship A is travelling at 6 km/h due east and ship B is travelling at 8 km/h due north. The velocity of B relative to A is

A. 7 km/hrs

B. 2 km/hrs

C. 1 km/hrs

D. 10 km/hrs

What is the correct answer?

4

A car goes round a curve of radius 100 m at 25 m/sec. The angle to the horizontal at which the road must be banked to prevent sideways friction on the car wheels is tan1 x, where x is (Assume g = 10 m/sec²)

A. 3/8

B. 1/2

C. 9/5

D. 5/8

What is the correct answer?

4

The centre of gravity of a triangle is at the point where three

A. Medians of the triangle meet

B. Perpendicular bisectors of the sides of the triangle meet

C. Bisectors of the angle of the triangle meet

D. None of these

What is the correct answer?

4

A sphere is resting on two planes BA and BC which are inclined at 45° and 60° respectively with the horizontal. The reaction on the plane BA will be

A. Less than that on BC

B. More than that of BC

C. Equal to that on BC

D. None of these

What is the correct answer?

4

A projectile is fired with a velocity of 100.3 m/sec. at an elevation of 60°. The velocity attained by the projectile when it is moving at a height of 100 m, is

A. 70 m/sec

B. 75 m/sec

C. 80 m/sec

D. 90 m/sec

What is the correct answer?

4

One Newton force, is

A. 103 dynes

B. 104 dynes

C. 105 dynes

D. 106 dynes

What is the correct answer?

4

P is the force acting on a body whose mass is m and acceleration is f. The equation P - mf= 0, is known as

A. Equation of dynamics

B. Equation of dynamic equilibrium

C. Equation of statics

D. None of these

What is the correct answer?

4

If the horizontal range is 2.5 times the greatest height, the angle of projection of the projectile, is

A. 57°

B. 58°

C. 59°

D. 60°

What is the correct answer?

4

Varingons theorem of moments states

A. Arithmetical sum of the moments of two forces about any point, is equal to the moments of their resultant about that point

B. Algebraic sum of the moments of two forces about any point, is equal to the moment of their resultant about that point

C. Arithmetical sum of the moments of the forces about any point in their plane, is equal to the moment of their resultant about that point

D. Algebraic sum of the moments of the forces about any point in their plane, is equal to the moment of their resultant about that point

What is the correct answer?

4

The equation of motion of a particle starting from rest along a straight line is x = t3 - 3l2 + 5. The ratio of the velocities after 5 sec and 3 sec will be

A. 2

B. 3

C. 4

D. 5

What is the correct answer?

4

For a particle moving with a simple harmonic motion, the frequency is

A. Directly proportional to periodic time

B. Inversely proportional to periodic time

C. Inversely proportional to its angular velocity

D. Directly proportional to its angular velocity

What is the correct answer?

4

Rate of change of angular momentum is equal to

A. Force

B. Torque

C. Linear momentum

D. Impulse

What is the correct answer?

4

The resultant of two forces acting at right angles is 5 kgf and if they act at an angle of 60°, it is 37 kgf. The magnitudes of the forces are:

A. 2 kgf, 3 kgf

B. 3 kgf, 4 kgf

C. 4 kgf, 5 kgf

D. 5 kgf, 3 kgf

What is the correct answer?

4

According to Kennedy's theorem, if three bodies have plane motions, their instantaneous centres lie on

A. A point

B. A straight line

C. Two straight lines

D. A triangle

What is the correct answer?

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

What is the correct answer?

4

The maximum displacement of a particle executing S.H.M. corresponds to

A. Zero potential energy and maximum kinetic energy

B. Zero kinetic energy and maximum potential energy

C. Maximum kinetic energy and maximum potential energy

D. Minimum kinetic energy and minimum potential energy

What is the correct answer?

4

The force which produces an acceleration of 1 m/sec2 in a mass of one kg, is called

A. Dyne

B. Newton

C. Joule

D. Erg

What is the correct answer?

4

Time required to stop a car moving with a velocity 20 m/sec within a distance of 40 m, is

A. 2 sec

B. 3 sec

C. 4 sec

D. 5 sec

What is the correct answer?

4

The motion of a bicycle wheel is

A. Translatory

B. Rotary

C. Rotary and translatory

D. Curvilinear

What is the correct answer?

4

If α and u are the angle of projection and initial velocity of a projectile respectively, the horizontal range of the projectile, is

A. u² sin α/g

B. u² sin² α/g

C. u² sin α/2g

D. u² sin² α/2g

What is the correct answer?

4

The C.G. of a right circular cone lies on its axis of symmetry at a height of

A. h/2

B. h/3

C. h/4

D. h/5

What is the correct answer?

4

Newton's law of Collision of elastic bodies states that when two moving bodies collide each other, their velocity of separation

A. Is directly proportional to their velocity of approach

B. Is inversely proportional to their velocity of approach

C. Bears a constant ratio to their velocity of approach

D. Is equal to the sum of their velocities of approach

What is the correct answer?

4

A particle of mass 2 kg executes simple harmonic motion of frequency 6/71 Hz and amplitude 0.25 m. Its maximum kinetic energy is

A. 4.5 J

B. 9.0 J

C. 12.0 J

D. 18.0 J

What is the correct answer?

4

On a ladder resisting on a smooth ground and leaning against a rough vertical wall, the force of friction acts

A. Towards the wall at its upper end

B. Away from the wall at its upper end

C. Upwards at its upper end

D. Downwards at its upper end