10th Standard Syllabus & Materials
10th Standard
TN 10th Tamil நாகரிகம், நாடு, சமூகம் - கவிதை பேழை (செய்யுள்) -முத்தொள்ளாயிரம் Sample Question Papers Study Material - QB365 Set A
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TN 10th Tamil உயிரின்ஓசை - துணைப்பாடம் -பிருமம் Sample Question Papers Study Material - QB365 Set A
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TN 10th Tamil அறம், தத்துவம், சிந்தனை - கவிதை பேழை (செய்யுள்) -தேம்பாவணி * Sample Question Papers Study Material - QB365 Set A
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Published on: 25/09/2019
Laws of Motion
Download Tamil Nadu 10th Standard Science question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Science Test1.
The momentum of a heavy object at rest will be
large
infinity
zero
small
2.
The resistance of a body to change its state of rest is called
inertia of rest
inertia of motion
momentum
inertia of direction
3.
To project the rockets which of the following principle(s) is /(are) required?
Newton’s third law of motion
Newton’s law of gravitation
law of conservation of linear momentum
both a and c
4.
5.
Inertia of a body depends on
weight of the object
acceleration due to gravity of the planet
mass of the object
Both a & b
6.
Momentum is a ______ quantity.
7.
A body changes its state, then it is said to be in ______
8.
A man of mass 100 kg has a weight of ___________ at the surface of the Earth
9.
By convention, the clockwise moments are taken as ___________ and the anticlockwise moments are taken as__________.
10.
To produce a displacement ___________ is required
11.
Assertion: The net force acting on a body is zero.
Reason: The body is moving uniformly along a straight line.
Codes:
a) Both assertion and reason are true and reason is correct explanation of assertion
b) Both assertion and reason are true but reason is not the correct explanation of assertion.
c) Assertion is true but reason is false
d) Assertion is false but reason is true
12.
Assertion: No force is required to move a body uniformly along a straight line.
Reason: Because F = ma = m(0) = 0.
Codes:
a) Both assertion and reason are true and reason is correct explanation of assertion
b) Both assertion and reason are true but reason is not the correct explanation of assertion.
c) Assertion is true but reason is false
d) Assertion is false but reason is true
13.
Assertion: A rocket moves forward by pushing the surrounding air backwards.
Reason: It drives the necessary thrust to move forward, according to Newton's second law.
Codes:
a) Both assertion and reason are true and reason is correct explanation of assertion
b) Both assertion and reason are true but reason is not the correct explanation of assertion.
c) Assertion is true but reason is false
d) Assertion is false but reason is true
14.
Assertion: The value of ‘g’ decreases as height and depth increase from the surface of the Earth.
Reason: ‘g’ depends on the mass of the object and the Earth.
a) If both the assertion and the reason are true and the reason is the correct explanation of assertion.
b) If both the assertion and the reason are true, but the reason is not the correct explanation of the assertion.
c) Assertion is true, but the reason is false.
d) Assertion is false, but the reason is true.
15.
What is meant by Apparent weight?
16.
State Newton’s second law.
17.
State the principle of moments.
18.
Differentiate mass and weight.
19.
Give the application of torque.
20.
A ball of mass 1 kg moving with a speed of 10 ms-1 rebounds after a perfect elastic collision with the floor. Calculate the change in linear momentum of the ball.
21.
State Newton’s laws of motion?
22.
Kinetics
23.
Newton's III law
24.
Principle of moments
25.
Newton’s III law
26.
Newton’s I law
27.
A boy puts a heavy box of mass M on his head and jumps down from the top of a multistoried building to the ground. How much is the force exerted by the box on his head during his force fall? Does the force of gravity increase during the fall?
28.
Action and reaction forces do not balance each other. Why?
29.
A lift is accelerated upward. What is apparent weight of a person inside the lift?
30.
Bodies of larger mass need greater effort to put them in motion. Why?
1.
(c)
zero
2.
(a)
inertia of rest
3.
(d)
both a and c
4.
(c)
5.
(c)
mass of the object
6.
( )
vector
7.
( )
motion
8.
( )
980 N
9.
( )
negative and positive
10.
( )
force
11.
a) Both assertion and reason are true and reason is the correct explanation of assertion
12.
a) Both assertion and reason are true and reason is the correct explanation of assertion
13.
d) Assertion is false but reason is true
14.
c) Assertion is true, but the reason is false.
15.
Apparent weight is the weight of the object acquired due to action of gravity and other external forces on the mass.
16.
(i) "According to Newton's second law, the force acting on a body is directly proportional to the rate of change of linear momentum of the body and the change in momentum takes place in the direction of the force".
(ii) Force = mass x acceleration
(iii) F = m x a
17.
(i) When a number of like or unlike parallel forces act on a rigid body and the body is in equilibrium, then the algebraic sum of the moments in the clockwise direction is equal to the algebraic sum of the moments in the anti-clockwise direction.
(ii) Moment in clockwise direction = Moment in anticlockwise direction.
(iii) F1 x d1 = F2 x d2.
18.
| S. No | Mass | Weight |
|---|---|---|
| (i) | Fundamental quantity. | Derived quantity. |
| (ii) | It is the amount of matter containing in a body. | It is the gravitational pull acting on the body. |
| (iii) | Its unit is kilogram (kg). | Its unit is newton (N). |
| (iv) | Remains the same. | Varies from one place to another place. |
| (v) | It is a scalar quantity. | It is a vector quantity. |
19.
(i) Gears: A gear is a circular wheel with teeth around its rim. It helps to change the speed of rotation of a wheel by changing the torque and helps to transmit power.
(ii) Seesaw: When the heavier person comes closer to the pivot point (fulcrum) the distance of the line of action of the force decreases. It causes less amount of torque to act on it. This enables the lighter person to lift the heavier person.
(iii) Steering Wheel: A small steering wheel enables you to manoeuore a car easily by transferring a torque to the wheels with less effort.
20.
Given \(\mathrm{m}=1 \mathrm{~kg}, \quad \mathrm{v}=10 \mathrm{~m} \mathrm{~s}^{-1}\)
When a ball bounces back with the same speed, the momentum changes from mv to -mv. So, the change in momentum is -2 mv.
Δp = mv - mu
= -mv - mv
\(=-2 \mathrm{mv}=-2 \times 1 \times 10 \) \([Here \ mu = mv \\ mv = -mv]\)
\(\therefore \Delta P=-20 \mathrm{~kg} \mathrm{~m} \mathrm{~s}^{-1}\)
21.
(i) Newton's First law: Newton's first law states that, everybody continues to be in its state of rest or the state of uniform motion along a straight line unless it is acted upon by some external force.
(ii) Newton's second law of motion: Newton's second law states that, the force acting on an object is directly proportional to the rate of change of linear momentum of the object and the change in momentum takes place in the direction of force.
(iii) Newton's third law of motion: Newton's third law states that, for every action there is an equal and opposite reaction. They always act on two different bodies.
22.
Cause of motion
23.
FB = - FA
24.
Sum of clockwise moments = sum of anticlockwise moments
25.
Flying nature of bird
26.
stable equilibrium of a body
27.
( )
F = mg1. No, the force of gravity does not increase.
28.
( )
This is because forces of action & reaction act always on the different bodies.
29.
( )
The opposite weight will increase.
30.
( )
According to Newton's II law, F = ma.
For given acceleration a, if m is large, F should be more i.e., greater force.
10th Standard Syllabus & Materials
10th Standard
TN 10th Tamil கூட்டாஞ்சோறு - இலக்கணம் - தொகைநிலை தொடர்கள் Sample Question Papers Study Material - QB365 Set A
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Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards
