Paper for Entry Test Preparation
Physics 1st year Chapter No. 3
Total marks:- 200 Time
allowed 40 minutes
Note:-
Fill the appropriate answer of the following questions in the answer sheet.
Double filling and erasing is not allowed. Each question carries equal marks
and for each wrong answer minus one is awarded.
1) Which one of the following is dimensionless:
a)
Acceleration b)
Velocity c)
Density d)
Angle
2) A constant force of 20 N is applied on a body of 5 Kg for 7 seconds. The total
change in moment will be:
a)
10 NS b)
100 NS c)
140 NS d)
200 NS
3) The slope of velocity-time graph represents:
a)
Acceleration b)
Speed c)
Torque d)
Work
4) An object is dropped from a height of 100 m. Its
velocity at the moment it touches the ground is:
a)
100 m/sec b)
140 m/sec c)
1960 m/sec d) 196
m/sec
5) Swimming becomes possible because of _____ law of
motion:
a)
First b)
Second c)
Third d)
Non of all
6) One Newton is a force that produces an
acceleration of 0.5 m/sec2 in a body of mass:
a)
2 Kg b)
3 Kg c) 4 Kg d)
8 Kg
7) The distance covered by a body in unit time is
called:
a)
Displacement b)
Speed c)
Velocity d)
Both (b) and (c)
8) Distance covered by a freely falling body in the
first second of its motion will be:
a)
4.9 m b)
9.8 m c)
19.6 m d)
29.4 m
9) If the acceleration of a body is not uniform,
then velocity-time graph will be:
a)
Curve b)
Straight line c)
Sphere d)
All of above
10) When Dt® 0, the acceleration of a moving
body is called:
a)
Average acceleration b)
Instantaneous acceleration c) Uniform
acceleration d) Non of these
11) Newton’s first law is also called as:
a)
Law of inertia b) Law
of force c) Law of
torque d) Non o these
12) Motion of a body along Y-axis is:
a)
One dimensional b) Two
dimensional c) Three
dimensional d) Non of these
13) A train covers 90 Km in half an hour. The taken
by it to travel 15 Km will be:
a)
20 min b)
48 min c)
10 min d)
5 min
14) If force of friction id negligible, then acceleration
of two freely falling objects of different masses is:
a)
Variable b)
The same c)
Smaller acceleration for smaller mass d)
Both a, c
15) If a gunman standing in a stationary boat in
water fires the gun in a horizontal direction, the boat will:
a)
Spin around b)
Move in the direction of target c) Move
away from target d) Non of these
16) For a fixed force, larger is the mass of a body:
a)
Smaller will be the acceleration b)
Greater will be the acceleration
c)
Same will be its acceleration d) Non of these
17) Which quantity has the same dimension as that of
impulse:
a)
KE b)
Power c)
Momentum d) Work
18) If two bodies of equal masses moving in the same
direction collide elastically, then their velocities:
a)
Are added b)
Are subtracted c) Do
not change d) Are
exchange
19) When the mass of the colliding body is much
larger than the mass of the body at rest, the velocity after collision:
a)
Becomes half b)
Becomes zero c)
Remain same d)
Becomes double
20) The term impulse is used when the force applied
on a body is:
a)
Not constant b)
Constant c)
both (a) and (b) d) Non
of all
21) A force of 100 N acts upon a body for 5 seconds.
What will be the change in momentum:
a)
200 NS b)
500 Kg m/sec c) 20 Kg
m/sec d) 1/20 NS
22) Change in momentum in one second is called:
a)
Impulse b)
Force c)
Energy d)
Work
23) When a bullet is fired form a rifle, the total
momentum of the system after firing is:
a)
Equal to the momentum of the bullet only b)
Equal to the momentum of the rifle only
c)
Equal to the momentum of the system before firing c) Non of these
24) During the upward motion of the projectile, the vertical
component of velocity:
a)
Decreases b)
Increases c)
Remain same d) Non
of these
25) Range of the projectile is the same for the
following pair of angles:
a)
0o and 45o b)
35o and 55o c) 15o and 60o d) 30o and
75o
26) The horizontal range of a projectile depends
upon:
a)
Initial velocity b
Angle of projection c) Value
of g d) All of
above
27) At the highest point, we can claim that:
a)
Resultant velocity id zero b) Only Vx
is zero c) Only Vy
is zero d) Nothing of
above
28) To improve the jumping record, the long jumpers
should jump:
a)
As high as possible b) At the
angle of 45o c) At
the angle of 60o d)
Non of these
29) The path followed by the projectile is known as:
a)
Cycle b)
Hyperbola c)
Trajectory d)
Route
30) The motion of the projectile is:
a)
One dimensional b) Two
dimensional c) Three
dimensional d) May be any of
these
31) The path of the projectile is determined by:
a)
Magnetic field b)
Electric field c)
Gravitational field d) Non
of these
32) A bomber drops its bomb when it is vertically
above the target. It misses the target due to:
a)
X- component of velocity b) Y-
component of velocity c) Pull of gravity d) All of above
33) During elastic collusion the total __ is
conserved:
a)
Momentum b)
Energy c)
Both (a) and (b) d) Non
of all
34) The law of conservation of linear momentum is
valid for:
a)
Atoms only b)
Molecules only c) Other
systems only d) All of them
35) Newton-second is a SI-unit of:
a)
Impulse b)
Acceleration c)
Torque d)
Angular momentum
36) A mass of 5000 grams moves with an acceleration
of 1000 cm sec-2, force on it is:
a)
10 N b)
50 N c)
2 N d)
15 N
37) Which of the following have same SI units:
a)
Force and momentum b) Impulse and
momentum c) Force and impulse d) Non of these
38) Newton’s second law of motion is also called as:
a)
Law of gravitation b) Law of
inertia c) Law of
acceleration d) Non of all
39) Which of the following is not a vector:
a)
Force b)
Displacement c)
Momentum d) Non
of all
40) Acceleration in a body is always produced in the
direction of:
a)
Velocity b)
Weight c)
Force d)
Both (b) and (c)
41) A ball is thrown vertically upward, it comes
back in 4 seconds. It has travelled more distance in:
a)
First second b)
Forth second c)
Third second d) Both
(a) and (b)
42) If a body has negative acceleration, the slope
of the velocity time graph will be:
a)
Zero b)
Positive c)
Negative d)
Infinity
43) The decrease in velocity per unit time is
called:
a)
Variable acceleration b) Average
acceleration c) Retardation d) Non of all
44) A dirty carpet is to be cleaned by beating, this
is accordance with__ law of motion:
a)
First b)
Second c)
Third d)
Non motion law
45) A body falling freely has:
a)
variable velocity b)
Uniform acceleration c) Variable
acceleration d) Both (a) and (b)
46) The relative speed of approach is always equal
to the relative speed of separation in:
a)
Partial elastic collision b) Perfectly
elastic collision c) Inelastic
collision d) Non of these
47) Two projectiles are thrown at different angles
and their horizontal range in same, the sum of these angles is:
a)
45o b)
90o c)
135o d)
180o
48) During the upward motion of the projectile, the
vertical component of the velocity:
a)
Decreases b)
Increases c)
Remain same d)
Becomes zero
49) The horizontal range and the maximum range of a
projectile is related as:
a)
R = Rmax sin2Ө b)
R = Rmax sin Ө c)
R = Rmax sin 2Ө d) 2R = Rmax sin2Ө
50) When sudden brakes are applied on fast moving
bus, passengers experience forward pull due to:
a)
Retardation b)
Inertia c)
Impulse d)
Non of all
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