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School
Name:____________________________________
Student Name:______________________
Subject: Physics
Class:______9th Section:___________ Roll No:______
Total Marks:_____________ Obtain
Marks:______________
Q.1. Choose the correct Option Form the following Multiple Choice
Question.
7
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1.
Unit of momentum
is :
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kgms⁻¹
|
Ns⁻¹
|
Kg⁻¹ ms
|
Kgm⁻¹ s⁻¹
|
2.
Inertia
depends on:
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Force
|
Net force
|
Mass
|
Velocity
|
3.
Rate of
change of momentum is called:
|
|||
Torque
|
Force
|
Mass
|
Distance
|
4.
Newton’s
first law of motion is valid only in the absence of:
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Force
|
Torque
|
Friction
|
Momentum
|
5.
Which one of
the following materials lowers friction when placed between two siding
surface:
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Water
|
Marble powder
|
Air
|
Oil
|
6.
1 N is equal
to :
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|||
kgms−2
|
Ns⁻¹
|
Kg⁻¹ ms
|
Kgm⁻¹ s⁻¹
|
7.
The unit of
force is :
|
|||
Nm
|
N
|
Metre
|
Kg
|
Q.2. Write the short answer of the
following question? 7*2=14
1.
Define
inertia. Give two examples of inertia.
2.
Define
force and write its S1 unit.
3.
When
a gum is fired,it recoils. Why .
4.
State
Newton’s first law of motion.
5.
Differentiate
between mass and weight.
6.
State
law of Conservation of momentum.
7.
Write
two advantages and two disadvantages of friction.
Q.3. Write the detailed Answers of
the following Questions . 5+4=9
1.
How can
you relate a force with the change of momentum of a body.
2.
Define
friction. Write two or three methods of reducing friction.
