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Test-1
Attempt all questions. Circle the best answer.
Name : ……………………………………………
1. Dust particles are removed from
clothes when hit with a stick. Which of the following corresponds to it?
a.
inertia of motion b. inertia of rest c. inertia of direction d.
all
2. If A
+ B = A – B then which of the
following is true?
a. B = 0 b. A = 0 c.
either A or B is zero d. all of
above
3. Which of the following relations is
correct?
a.
distance ≥ displacement b. |displacement| ≥
distance
c.
distance > |displacement| d. distance ≥ |displacement|
4. What is the
dimension of light year?
a. [L1] b.
[T1] c. [L1T1] d. [L1T-1]
5. The mass of a man is
50 kg on the earth. What is his mass on the moon?
a. 300 kg b.
8.33 kg c. 50 kg d. 80 kg
6. The weight of a body
at the equator is 30N. Its weight at the poles ……….
a. decreases because value of g decreases at poles
b. decreases because value of g increases at poles
c. increases because value of g decreases at poles
d. increases because value of g increases at poles
7. A stone of mass 10
kg and another of mass 20 kg are dropped simultaneously. Which one reaches the
ground first?
a. 10 kg b.
20 kg c. both reach at same time d.
none of above
8. Two vectors of equal
magnitude are added and their resultant is found to be zero. What is the angle
between them?
a. 0 rad. b. π/2 rad. c. π rad. d. 2π rad.
9. Which of the following has the same
dimension?
a.
Force and power b. work and power
c.
work and energy d. energy and power
10. How much gravitational force is
produced when two bodies each of mass 1 kg are separated by a distance of 1 m?
a.
6.67x10-11 N b. 1 N c.
6.67x10-11 Nm2kg-2 d. 1 Nkg-1
11. A man weighs 70 kg on the Earth.
What is his weight on the moon?
a. 686 N b. 114 N c. 70 N d.
700 N
12. The force of attraction
of the Earth on a body is called …………
a. Gravitational force b. Force of gravity
c. Acceleration due to gravity c. Attractive force
13. Which of the following
system of units represents S.I. system?
a. CGS System b. FPS system
c. MKS
System d. Extended MKS System
14. Two bodies, each of mass
10 kg are separated by a distance of 10 m. What is the force of gravitation
between them?
a. 6.67x10-11 N b.
6.67x10-6 Dyne
c. both a
and b d. 98N
15. What is the S.I. unit of
amount of substance?
a. kg b. mass c. mole d.
candela
16. Kilowatt hour is the
unit of ………..
a. Energy b.
Work c. Power d. Force
17. What is the relation
between Dyne and Newton?
a. 1 dyne = 1 N b.
1 dyne = 10-5 N
c. 1 N = 105 dyne d. both b and c
18. Which of the following
is a fundamental unit?
a. Ampere b.
Coulomb c. Ohm d. Volt
19. The unit of gravity is ………..
a.
ms-2 b. N/kg c. N d.
Nm2kg-2
20. Which of the following is a
scalar quantity?
a.
acceleration b. speed c. velocity d. all of above
Home Assignment
Circle the best answer. Name:
…………………………………
1. A particle is travelling with
constant speed.
a.
Its position remains constant as time passes
b.
It covers equal distance in equal time intervals
c.
Its acceleration is zero
d.
It does not change its direction of motion
2. Which of the following does not
change during expansion?
a. mass b. length c. volume d. area
3. Sound travels at a speed of 332 ms-1
in air. This means ……….
a.
The source of sound moves 332 m in one second
b.
The listener moves 332 m in one second
c.
Air moves 332 m in one second
d.
The disturbance moves 332 m in one second
4. A body of mass m has kinetic
energy E. The magnitude of its momentum is …….
a.
√(2Em) b. 4E2/m c. 2E/√m d. √(Emv)
5. Action and reaction forces ……..
a.
act on the same body b. act on different bodies
c.
act along different lines d. act in the same direction
6. Qualitative definition of force is
given by …….
a.
Newton’s first law b. Newton’s
second law
c.
Newton’s third law d. Newton’s
law of gravitation
7. The S.I. unit of upthrust is
a.
Newton b. Joule c.
Newton meter d. none of above
8. The earth attracts a body of mass
1 kg kept on its surface with a force of ……
a.
1 N b. 6.7x10-11
N c.
9.8 N d.
1/9.8 N
9. Newton is the short form of ………
a.
gms-1 b. kgm2s-2 c. kg2m2s-2 d. kgms-2
10. A ball thrown upwards from a
point A reaches up to the highest point B. Then:
a.
Kinetic energy at A = Kinetic energy at B
b.
Potential energy at A = Potential energy B
c.
Potential energy at B = Kinetic energy at B
d.
Potential energy at B = Kinetic energy at A
11. Four bodies have the following
masses and speed. The body having the largest magnitude of momentum is
body
|
mass
|
Speed
|
A
|
1
kg
|
10
ms-1
|
B
|
1
kg
|
9
ms-1
|
C
|
2
kg
|
8
ms-1
|
D
|
4
kg
|
7
ms-1
|
a. A b.
B
c. C d.D
12. A body of mass 10 kg moving at a
height of 2 m with a speed 2ms-1 has a total energy
a.
196 J b. 216 J c. 20 J d. 316 J
13. A heavenly body that has mass 2Me
and radius 2Re where Me and Re are the
mass and radius of the Earth. The acceleration due to gravity at the surface of
this body is ………
a.
2.45 ms-2 b.
4.9 ms-2 c.
9.8 ms-2 d.
19.6 ms-2
14. A body of mass 2 kg is dropped
from a height 1m. Its kinetic energy at the ground is:
a.
19.6 J b.
9.6 J c.
29.6 J d.
19.6 m
15. A car travels the first half of
the distance between two spots at a speed of 40 km/hr and the second half
distance at 60 km/hr. What is the average speed of the car?
a.
46 km/hr b. 48 km/hr c. 50 km/hr d. 52 km/hr
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