Multiple Choice Questions
1. Stoke’s
law is applicable to
a) Motion
through horizontal surface
b) Motion through free space
c) Motion
through viscous medium
d) Motion through non-resistive medium
2. A fog
droplet falls vertically with an acceleration while touching ground
a) Equal to
g
b) Less than g
c) Greater
than g
d) Equal to zero
3. The
terminal velocity of a body falling vertically through a fluid
a) Increases
with increase in mass
b) Decreases with increase in mass
c) Remains
same with increase in mass
d) None of the above
4. The
terminal velocity in case of spherical droplet is
a) Inversely
proportional to the radius of the droplet
b) Directly
proportional to the radius of the droplet
c) Inversely
proportional to the square of the radius of the droplet
d) Inversely
proportional to the cube of the radius of the droplet
5.
Neglecting friction, the motion of a body on an inclined plane is independent
of the
a) Area of
the body
b) Volume of the body
c) Density
of the body
d) Mass of the body
6. The
acceleration of a spherical ball on a smooth inclined plane is maximum when the
angle of
inclination
to the horizontal is
a) 90o
b) 60o
c) 30o
d) 0o
7. A
constant mass undergoes finite uniform acceleration when the resultant force
acting on it
a) Is
proportional to the velocity
b) Is zero
c) Is
constant but not zero
d) Increases uniformly with respect to time
8.
Newton’s third law concerns the forces of interaction between two bodies. Which
of the
following
statements relating to the third law is not correct?
a) The two
forces must act on two different bodies
b) The two
forces are always opposite in direction
c) The two
forces are at all times equal is magnitude
d) The two
forces are equal and opposite so the bodies are in equilibrium
9. When a
force of 4N acts on a mass of 2 kg for a time of 2s, what is the rate of change
of
momentum?
a) 1 kg m s-2
b) 2 kg m s-2
c) 4 kg m s-2
d) 8 kg m s-2
10. A force
of 20 N acts on a body of mass 100 g. The acceleration produced in the body is
a) 20 m s-2
b) 2 m s-2
c) 2000 m s-2
d) 200 m s-2
