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MCQs

Total Questions : 1187 | Page 61 of 119 pages
Question 601.


In ideal machines, mechanical advantage is __________ velocity ratio.


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


Question 602.


Which of the following is a scalar quantity?


  1.    Force
  2.    Speed
  3.    Velocity
  4.    Acceleration
 Discuss Question
Answer: Option B. -> Speed


Question 603.
 
If two bodies having masses m1 and m2 (m1>m2) have equal kinetic energies, the momentum of body having mass m1 is __________ the momentum of body having mass m2.
  1.    equal to
  2.    less than
  3.    greater than
 Discuss Question
Answer: Option C. -> greater than


Question 604.
two like parallel forces are acting at a distance of 24 mm apart and
their resultant is 20 N. It the line of action of the resultant is 6 mm
from any given force, the two forces are
  1.    15 N and 5 N
  2.    20 N and 5 N
  3.    15 N and 15 N
  4.    none of these
 Discuss Question
Answer: Option A. -> 15 N and 5 N


Question 605.

One watt is equal to



  1.    0.1 joule/s
  2.    1 joule/s
  3.    10 joules/s
  4.    100 joules/s
 Discuss Question
Answer: Option B. -> 1 joule/s


Question 606.

 
Work done is said to be zero, when


  1.    some force acts on a body, but displacement is zero
  2.    no force acts on a body but some displacement takes place
  3.    either (a) or (b)
  4.    none of the above
 Discuss Question
Answer: Option C. -> either (a) or (b)


Question 607.

 
The force which acts along the radius of a circle and directed away from the centre of the circle is called centrifugal force.


  1.    Agree
  2.    Disagree
 Discuss Question
Answer: Option A. -> Agree


Question 608.

If two blocks of equal mass are attached to the two ends of a light
string and one of the blocks is placed over a smooth horizontal plane
while the other is hung freely after passing over a smooth pulley, then
the two blocks will have some motion.


  1.    Agree
  2.    Disagree
 Discuss Question
Answer: Option A. -> Agree


Question 609.

 
During elastic
impact, the relative velocity of the two bodies after impact is
__________ the relative velocity of the two bodies before impact.


  1.    equal to
  2.    equal and opposite to
  3.    less than
  4.    greater than
 Discuss Question
Answer: Option B. -> equal and opposite to


Question 610.

 
A resultant force is a single force which produces the same effect as produced by all the given forces acting on a body.


  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True


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