9th Physics (Ch # 1,2,3,4,5) Marks: 12
Name: ______________________
1) A train is moving
at a speed of 36 kmh-1. Its speed expressed in ms-1
(a) 10 ms-1 (b) 20 ms-1 (c)
25 ms-1 (d)
30 ms-1
2)
Which of the
following material lowers friction when pushed between metal plates?
(a) water (b) fine marble
powder (c) air (d) oil
3) A force of 10 N
is making an angle of 30o with the horizontal. Its horizontal
component will be:
(a) 4 N (b) 5 N (c) 7 N (d) 8.7 N
4) The value of ‘g’
on the surface of the moon is:
(a)
1.62 ms-2 (b) 10ms-2 (c) 20ms-2 (d) zero
5)
A student claimed the diameter of a wire as
1.032 cm using Vernier calipers. Up to what extent do you agree with it?
(a)
1 cm (b) 1.0 cm (c)
1.03 cm (d) 1.032 cm
6) A student noted the thickness of the glass sheet using a screw gauge. On the main scale, it reads 3 divisions while the 8th division on the circular scale coincides with the index line. Its thickness is.
(a)
3.8 cm (b) 3.08 mm (c) 3.8 mm (d) 3.08 m
7) A train starts from rest. Its velocity becomes 40ms–1 in 10s. Its acceleration will be:
(a) 4 ms–2 (b) 4 ms–1 (c) 40
ms–1 (d) 40 ms–2
8) A string is stretched by two equal and opposite forces 10 N each. The tension in the string is:
(a) zero (b) 5N (c) 10 N (d) 20 N
9)
In a right-angled triangle, the length of the base is 4cm and its hypotenuse is 5cm, find the length of the perpendicular
(a) 1 cm (b) 20 cm (c) 3 cm (d) 9 cm
10) Moon is nearly km away from the Earth:
(a) 3,80,000 km (b) 3800 km (c) 3,80
km (d) 38
km
11) A car starts from rest. It acquires a speed of
25 ms-1 after 20 s. The distance moved by car during this time
is
(a) 31.25 m (b)
250 m (c) 500 m (d) 5000 m
12) Coefficient of friction between tire and the dry road is.
(a) 0.6 (b) 1 (c) 0.05 (d) 0.2
Subjective Part
Subject: Physics Class: IX Total Marks: 48
2. Answer any 15 Questions (15 × 2 = 30)
ii.
Differentiate between uniform Speed and uniform velocity.
iii.
Differentiate between kinematics & dynamics.
iv.
Define Couple. How is the torque produced in the right body due to the couple?
v.
How the value of ‘g’ varies with altitude?
vi.
How can we measure the volume of
an irregular-shaped solid object?
vii.
What is meant by the coefficient of friction? Write its mathematical form.
viii.
What is a moment? Write its principle.
ix.
Why can we not feel the force of attraction between the objects around
us?
x.
How can you find the center of gravity of an irregularly
shaped body? Explain it with an experiment.
xi.
State Newton's first law of motion. Why is it called the law of inertia?
xii.
What is meant by banking of
road?
xiii.
On closing the jaws of a Vernier Calipers, zero of the Vernier scale is
on the right to its main scale such that the 4th division of its Vernier
scale coincides with one of the main scale divisions. Find its zero error and
zero correction
xiv.
What is the difference between
base and derived Units? Write names of both units
xv.
Differentiate between Scalar and Vector quantities.
xvi.
What is the difference between Mass & weight?
xvii.
What is meant by positive and negative acceleration?
3. Answer any 2 Questions (9 × 2 = 18)
Q.1 (a) Define rectangular components.
How can a force be resolved into its rectangles component? (5)
(b) The value of g is 4.0 ms-2
at a distance of 104 km from the center of the Earth. Find the mass
of the Earth.
Q.2(a) Find
the tension and acceleration during vertical motion of two bodies attached to ends
of a string that passes over a frictionless pulley.
(b) What
is meant by Stopwatch? Write its types and their working.
Q.3
(a) Define satellites. Find the orbital velocity
of artificial satellites.
(b) A cyclist completes half a round of a circular
track of radius 318 m in 1.5 minutes. Find its speed and velocity.
