Mechanics is a major part of physics and an area of science concerned with the behaviour of physical bodies when subjected to forces or displacements, and the subsequent effects of the bodies on their environment. It has 2 major parts classical mechanics which deals with Isaac Newton's laws of motion and quantum mechanics.
1. A particle moves with a uniform velocity.
(a) the particle must be at rest
(b) the particle moves along a curved path
(c) the particle moves along a circle
(d) the particle moves along a straight line
2. A body rolling freely on the surface of the earth eventually comes to rest because
(a) it has mass
(b) it suffers friction
(c) it has inertia of rest
(d) it has momentum
3. The momentum of a body of given mass is proportional to its
(a) volume
(b) shape
(c) speed
(d) colour
4. Which of the following is not the unit of energy ?
(a) calorie
(b) joule
(c) electrons volt
(d) watt
5. Light-year is the unit of
(a) time
(b) speed of light
(c) distance
(d) mass
6. A train of length 150 m is going towards North with speed of 10 m/s. A parrot flies at a speed of 5 m/s towards South parallel to the railway track. The time taken by the parrot to cross the train is :
(a) 12 second
(b) 8 second
(c) 15 second
(d) 10 second
7. Pick out the only scalar quantity
(a) power
(b) electric field
(c) magnetic momentum
(d) average velocity
8. A coin and a feather are dropped to together in a vacuum
(a) the coin will reach the ground first
(b) the feather will reach the ground first
(c) both the bodies will reach the ground together
(d) the feather will not fall down
9. Unit of solid angle is
(a) degree
(b) radian
(c) steradian
(d) radian-second
10. The force of gravitation between two bodies of mass 1 kg each kept at a distance of 1 m is
(a) 6.67 N
(b) 6.67 x 10-9 N
(c) 6.67 x 10-7 N
(d) 6.67 x 10-11 N
11. Which of the following has the largest inertia?
(a) a pin
(b) an ink-pot
(c) you physics textbook
(d) your body
12. Machine oil is put between moving parts of a machine to
(a) change the friction from kinetic to static
(b) reduce the friction
(c) increase the friction
(d) change the friction from static to kinetic
13. Five equal forces of 10 N each are applied at one point and all are lying in one plane. If angles between them are equal, the resultant of these forces will be :
(a) Zero
(b) 10 N
(c) 20 N
(d) 102 N
14. The principle of conservation of linear momentum states that the linear momentum of a system
(a) cannot be changed
(b) cannot remain constant
(c) can be changed only if internal forces at
(d) can be changed only if external forces act
15. Masses of stars and galaxies are usually expressed in terms of
(a) neutron mass
(b) Earth's mass
(c) solar mass
(d) lunar mass
16. A coin flicked across a table stops because
(a) no force acts on it
(b) it is very heavy
(c) the table exerts frictional force on it
(d) the Earth attracts it
17. An object with a constant speed
(a) is not accelerated
(b) might be accelerated
(c) is always accelerated
(d) also has a constant velocity
18. A body slides down a frictionless inclined plane when released from rest. In other body falls freely from the same height, then
(a) both reach the ground together
(b) body sliding down the plane will strike the ground first
(c) both reach the ground with same acceleration
(d) both reach the ground with the same speed
19. One light-year is approximately equal to
(a) 1011 km
(b) 1016 m
(c) 1015 m
(d) 1016 km
20. A body rolling freely on the surface of the earth eventually comes to rest because
(a) it has mass
(b) it suffers friction
(c) it has inertia of rest
(d) it has momentum
1. A particle moves with a uniform velocity.
(a) the particle must be at rest
(b) the particle moves along a curved path
(c) the particle moves along a circle
(d) the particle moves along a straight line
Answer : (d) the practical moves along a straight line
Explanation :
No explanation available for this answer2. A body rolling freely on the surface of the earth eventually comes to rest because
(a) it has mass
(b) it suffers friction
(c) it has inertia of rest
(d) it has momentum
Answer : (b) it suffers friction
Explanation :
No explanation available for this answer3. The momentum of a body of given mass is proportional to its
(a) volume
(b) shape
(c) speed
(d) colour
Answer : (c) speed
Explanation :
No explanation available for this answer4. Which of the following is not the unit of energy ?
(a) calorie
(b) joule
(c) electrons volt
(d) watt
Answer : (d) watt
Explanation :
No explanation available for this answer5. Light-year is the unit of
(a) time
(b) speed of light
(c) distance
(d) mass
Answer : (c) distance
Explanation :
No explanation available for this answer6. A train of length 150 m is going towards North with speed of 10 m/s. A parrot flies at a speed of 5 m/s towards South parallel to the railway track. The time taken by the parrot to cross the train is :
(a) 12 second
(b) 8 second
(c) 15 second
(d) 10 second
Answer : (d) 10 second
Explanation :
No explanation available for this answer7. Pick out the only scalar quantity
(a) power
(b) electric field
(c) magnetic momentum
(d) average velocity
Answer : (a) power
Explanation :
No explanation available for this answer8. A coin and a feather are dropped to together in a vacuum
(a) the coin will reach the ground first
(b) the feather will reach the ground first
(c) both the bodies will reach the ground together
(d) the feather will not fall down
Answer : (c) both the bodies will reach the ground together
Explanation :
No explanation available for this answer9. Unit of solid angle is
(a) degree
(b) radian
(c) steradian
(d) radian-second
Answer : (c) steradian
Explanation :
No explanation available for this answer10. The force of gravitation between two bodies of mass 1 kg each kept at a distance of 1 m is
(a) 6.67 N
(b) 6.67 x 10-9 N
(c) 6.67 x 10-7 N
(d) 6.67 x 10-11 N
Answer : (d) 6.67 x 10-11 N
Explanation :
No explanation available for this answer11. Which of the following has the largest inertia?
(a) a pin
(b) an ink-pot
(c) you physics textbook
(d) your body
Answer : (d) your body
Explanation :
No explanation available for this answer12. Machine oil is put between moving parts of a machine to
(a) change the friction from kinetic to static
(b) reduce the friction
(c) increase the friction
(d) change the friction from static to kinetic
Answer : (b) reduce the friction
Explanation :
No explanation available for this answer13. Five equal forces of 10 N each are applied at one point and all are lying in one plane. If angles between them are equal, the resultant of these forces will be :
(a) Zero
(b) 10 N
(c) 20 N
(d) 102 N
Answer : (a) Zero
Explanation :
No explanation available for this answer14. The principle of conservation of linear momentum states that the linear momentum of a system
(a) cannot be changed
(b) cannot remain constant
(c) can be changed only if internal forces at
(d) can be changed only if external forces act
Answer : (d) can be changed only if external forces act
Explanation :
No explanation available for this answer15. Masses of stars and galaxies are usually expressed in terms of
(a) neutron mass
(b) Earth's mass
(c) solar mass
(d) lunar mass
Answer : (c) solar mass
Explanation :
No explanation available for this answer16. A coin flicked across a table stops because
(a) no force acts on it
(b) it is very heavy
(c) the table exerts frictional force on it
(d) the Earth attracts it
Answer : (c) the table exerts frictional force on it
Explanation :
No explanation available for this answer17. An object with a constant speed
(a) is not accelerated
(b) might be accelerated
(c) is always accelerated
(d) also has a constant velocity
Answer : (b) might be accelerated
Explanation :
No explanation available for this answer18. A body slides down a frictionless inclined plane when released from rest. In other body falls freely from the same height, then
(a) both reach the ground together
(b) body sliding down the plane will strike the ground first
(c) both reach the ground with same acceleration
(d) both reach the ground with the same speed
Answer : (d) both reach the ground with the same speed
Explanation :
No explanation available for this answer19. One light-year is approximately equal to
(a) 1011 km
(b) 1016 m
(c) 1015 m
(d) 1016 km
Answer : (c) 1015 m
Explanation :
No explanation available for this answer20. A body rolling freely on the surface of the earth eventually comes to rest because
(a) it has mass
(b) it suffers friction
(c) it has inertia of rest
(d) it has momentum
Answer : (b) it suffers friction
Explanation :
No explanation available for this answer
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