1.
A particle is thrown in vertically upward direction from the surface
of earth. Its velocity-time graph will be-
2.
An object starting from rest acquires a velocity V in time T. The
instantaneous power developed at time t is proportional to:
(1) (V/T) t
(2) V2t2/T
(3) (V2/T2) t
(4)
V2 t2/T2
3.
Newton’s second law of Motion:
(1)
Defines the force
(2)
Measures the force
(3)
Measures the momentum
(4)
Measures the impulse
4.
Impulse is equal to:
(1)
Area under F-t graph
(2)
Rate of change of force with time
(3)
Rate of change of momentum
(4)
Impact of force
5.
Dyne-cm is the unit of:-
(1)
Work
(2)
Power
(3)
Momentum
(4)
Impulse
6.
Mass of earth in terms of g, G and R (radius of earth) is
(1)
GR/g
(2)
gR2/G
(3)
g2R/G
(4)
Gg/R
7.
Period of a simple pendulum at the centre of earth is
(1)
0
(2)
2
(3)
1
(4)
Infinite
8.
An object is moved 32 km vertically upward from the surface of earth.
Percentage change in its weight will be
(1)
1%
(2)
2%
(3)
3%
(4) 4%
9.
A body is just floating in a homogeneous liquid. The body is just
pressed down and released, it will:
(1)
Start oscillating
(2)
Sink to bottom
(3)
Come to same position immediately
(4)
Come to initial position slowly
10.
A body is moving unidirectionally under constant power. Its
displacement is proportional to
(1)
t1/2
(2)
t
(3)
t3/2
(4)
t2
11.
The momentum of an object decreases by 20%. The percentage decrease in
its kinetic energy
(1)
8
(2)
18
(3)
36
(4)
40
12.
The ratio of kinetic energy of two bodies is 4:1 and ratio of their
momentum is 1:1. The ratio of their masses s:-
(1)
4:1
(2)
1:1
(3)
1:2
(4)
1:4
13.
The variation of gravitational force between two bodies versus
distance between them:-
14.
Earth revolves around sun as:-
At which point its
linear velocity is maximum
(1)
A
(2)
B
(3)
C
(4)
D
15.
When a body is projected in space there is an increase in is
____________
(1)
Kinetic energy
(2)
Potential energy
(3)
Momentum
(4)
Mass
16.
Two cylinders A and B of mass m each and radius r and 2r respectively
are placed on a smooth horizontal surface vertically. The ratio of pressures
exerted by them respectively on the surface is:
(1)
1:2
(2)
2:1
(3)
4:1
(4)
1:8
17.
Three holes A, B, and C of equal size are drilled in an iron drum
filled with water, at vertical distances 10 cm, 40 cm & 60 cm from its
bottom respectively, from which hole the water reaches the farthest distance:-
(1)
A
(2)
B
(3)
C
(4)
All A,B and C equal
18.
Which of the following statement(s) is/are true about universal
gravitational constant G?
A.
Value of ‘G’ is same everywhere
B.
Its value is same in all systems of units
C.
Its value was first found by Henry Cavendish
Code:-
(1)
A and B only
(2)
B and C only
(3)
A and C only
(4)
All A,B and C
19.
Which of the following is not used as lubricant in machines and
engines?
(1)
Graphite
(2)
Air cushion
(3)
Mobil
(4)
Crude Oil
20.
The drag exerted by fluids depends on
A.
Shape of the object
B.
Nature of the fluid
C.
Speed of the object with respect to the fluid
Code;
(1)
A and B only
(2)
B and C only
(3)
A and C only
(4)
All A,B and C
22.
Which of the following is not used as lubricant in machines and
engines?
(1)
Graphite
(2)
Air cushion
(3)
Mobil
(4)
Crude Oil
23.
The drag exerted by fluids depends on
A.
Shape of the object
B.
Nature of the fluid
C.
Speed of the object with respect to the fluid
Code;
(1)
A and B only
(2)
B and C only
(3)
A and C only
(4)
All A,B and C
24.
Two cars A and B moving with uniform velocities of 60 kmph and 80 kmph
respectively are at points X and Y on a straight road 420 km apart. If the cars
meet at a point P between X and Y the ratio of the distances XP and PY is:
(Assuming that cars are moving in opposite directions)
(1)
7:5
(2)
3:4
(3)
6:7
(4)
7:6
25.
In the equations of motion,
S=at+bt2, S and t have the SI unit m ans s respectively, then the SI
units of a and b respectively are:-
(1)
ms-2, ms-1
(2)
ms-1, ms-2
(3)
ms-1, ms-1
(4)
ms-2, ms-2
26.
An object starts moving from rest with a uniform acceleration of 4 ms-2
. The distances travelled by it in 6th, 7th and 8th
seconds of its journey respectively are in the ratio:
(1)
6:7:8
(2)
36:49:64
(3)
11:13:15
(4)
121:169:225
27.
Two stones with masses m1 and m2 (m1>m2)
were thrown vertically upwards from ground with velocity u1 and u2
respectively. The time period for which they remained in air are:
(1)
u1/m1 g
and u2/m2 g respectively
(2)
u1 m1/g and u2 m2/g
respectively
(3)
2m1/g and 2m2/g respectively
(4)
2u1/g and 2u2/g respectively
28.
The volume of 50 g of a solid substance X is 20 cm3 and
that of 25 g of another solid substance Y is 25 cm3. If these two
solids are immersed in a liquid ofdensity 0.875 g/cm3 (both X and Y
are insoluble in given liquid). Then-
(1)
X will sink, Y will float
(2)
X will sink, Y will remain submerged in the liquid
(3)
Both X and Y will sink
(4)
Both X and Y will float
Note: Solution to selected problems will be provided soon.
