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Total Questions : 1187 | Page 63 of 119 pages
Question 621.

When a particle moves along a circular path with uniform velocity, there will be no tangential acceleration.


  1.    Correct
  2.    Incorrect
 Discuss Question
Answer: Option A. -> Correct


Question 622.
 
A body will begin to move down an inclined plane if the angle of inclination of the plane is __________ the angle of friction.
  1.    equal to
  2.    less than
  3.    greater than
 Discuss Question
Answer: Option C. -> greater than


Question 623.
 
The mechanical advantage of a lifting machine is the ratio of
  1.    distance moved by effort to the distance moved by load
  2.    load lifted to the effort applied
  3.    output to the input
  4.    all of the above
 Discuss Question
Answer: Option B. -> load lifted to the effort applied


Question 624.

The force
required to move the body up the plane will be minimum if it makes an
angle with the inclined plane __________ the angle of friction.


  1.    equal to
  2.    less than
  3.    greater than
 Discuss Question
Answer: Option A. -> equal to


Question 625.

 
Coefficient of friction is the ratio of the limiting friction to the normal reaction between the two bodies.


  1.    Yes
  2.    No
 Discuss Question
Answer: Option A. -> Yes


Question 626.

The range of a projectile is maximum, when the angle of projection is


  1.    `30^circ`
  2.    `45^circ`
  3.    `60^circ`
  4.    `90^circ`
 Discuss Question
Answer: Option B. -> `45^circ`


Question 627.
 
The total time taken by a projectile to reach maximum height and to return back to the ground, is known as time of flight.
  1.    Yes
  2.    No
 Discuss Question
Answer: Option A. -> Yes


Question 628.

 
A smooth cylinder lying on its convex surface remains in __________ equilibrium.


  1.    stable
  2.    unstable
  3.    neutral
 Discuss Question
Answer: Option B. -> unstable


Question 629.

 
If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is


  1.    `30^circ`
  2.    `60^circ`
  3.    `90^circ`
  4.    `120^circ`
 Discuss Question
Answer: Option D. -> `120^circ`


Question 630.

A body of weight W
is required to move up on rough inclined plane whose angle of
inclination with the horizontal is `alpha`The effort applied parallel to the
plane is given by(where `mu`= tan`phi` = Coefficient of friction between the
plane and the body.)


  1.    P = W tan`alpha`
  2.    P = W tan(`alpha` + `phi`)
  3.    P = W (sin`alpha` +`mu`cos`alpha`)
  4.    P = W (cos`alpha` +`mu`sin`alpha`)
 Discuss Question
Answer: Option C. -> P = W (sin`alpha` +`mu`cos`alpha`)


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