Questions and answers for exam Preparation

MCQs

Total Questions : 1284 | Page 3 of 129 pages

Question 21. A body of weight ‘w’ placed on an inclined plane is acted upon by a force ‘p’ parallel to the plane which causes the body just to move up the plane. if the angle of inclination of the plane is ‘θ’ and angle of friction is ‘φ’, the minimum value of ‘p’, is

w sin (φ - θ)/cos φ
w sin (θ - φ)/cos φ
w cos (θ + φ)/cos φ
w sinθ cos(θ - φ)/sin φ

Discuss Question

Answer: Option B. -> w sin (θ - φ)/cos φ

Question 22. On a mass ‘m’ describing a circular path of radius ‘r’, the centrifugal force

Acts tangentially to the circular path
Acts towards the centre of rotation
Acts away from the centre of rotation
Is mw2r/g kgf

Discuss Question

Answer: Option B. -> Acts towards the centre of rotation

Question 23. On a mass ‘m’ describing a circular path of radius ‘r’, the centrifugal force

Acts tangentially to the circular path
Acts towards the centre of rotation
Acts away from the centre of rotation
Is mw2r/g kgf

Discuss Question

Answer: Option B. -> Acts towards the centre of rotation

Question 24. On a mass ‘m’ describing a circular path of radius ‘r’, the centrifugal force

Acts tangentially to the circular path
Acts towards the centre of rotation
Acts away from the centre of rotation
Is mw2r/g kgf

Discuss Question

Answer: Option B. -> Acts towards the centre of rotation

Question 25. On a mass ‘m’ describing a circular path of radius ‘r’, the centrifugal force

Acts tangentially to the circular path
Acts towards the centre of rotation
Acts away from the centre of rotation
Is mw2r/g kgf

Discuss Question

Answer: Option B. -> Acts towards the centre of rotation

Question 26. If ‘v’ and ‘ω’ are linear and angular velocities, the centripetal acceleration of a moving body along the circular path of radius ‘r’, will be

r/v²
v²/r
r/ω²
ω²/r

Discuss Question

Answer: Option B. -> v²/r

Question 27. If ‘v’ and ‘ω’ are linear and angular velocities, the centripetal acceleration of a moving body along the circular path of radius ‘r’, will be

r/v²
v²/r
r/ω²
ω²/r

Discuss Question

Answer: Option B. -> v²/r

Question 28. Varingon’s theorem of moment’s states

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

Discuss Question

Answer: Option 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

Question 29. Varingon’s theorem of moment’s states

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

Discuss Question

Answer: Option 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

Question 30. Varingon’s theorem of moment’s states

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

Discuss Question

Answer: Option 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