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2: Optics
3: Thermal Physics
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6: Nuclear Physics
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8: Periodic Classification of Elements
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11: Carbon and its Compounds
12: Plant Anatomy and Plant Physiology
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21: Health and Diseases
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![Samacheer Kalvi solutions for Science [English] Class 10 SSLC TN Board chapter 1 - Laws of Motion - Shaalaa.com](/images/science-english-class-10-sslc-tn-board_6:5f2b1b2038084cf381bfa42c826a928c.jpg "Samacheer Kalvi solutions for Science [English] Class 10 SSLC TN Board chapter 1 - Laws of Motion")
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Solutions for Chapter 1: Laws of Motion
Below listed, you can find solutions for Chapter 1 of Tamil Nadu Board of Secondary Education Samacheer Kalvi for Science [English] Class 10 SSLC TN Board.
Samacheer Kalvi solutions for Science [English] Class 10 SSLC TN Board 1 Laws of Motion Evaluation [Pages 13 - 15]
Choose the correct answer
Inertia of a body depends on
weight of the object
acceleration due to gravity of the planet
mass of the object
Both a & b
Impulse is equals to
rate of change of momentum
rate of force and time
change of momentum
rate of change of mass
Newton’s III law is applicable
for a body is at rest
for a body in motion
both a & b
only for bodies with equal masses
Plotting a graph for momentum on the Y-axis and time on X-axis. the slope of the momentum-time graph gives
Impulsive force
Acceleration
Force
Rate of force
In which of the following sport the turning of the effect of force used
swimming
tennis
cycling
hockey
The unit of ‘g’ is m s-2. It can be also expressed as
cms-1
Nkg-1
Nm2 kg-1
cm2 s-2
One kilogram-force equals to
9.8 dyne
9.8 × 104 N
98 x 104 dyne
980 dyne
The mass of a body is measured on planet Earth as M kg. When it is taken to a planet of radius half that of the Earth then its value will be ______ kg.
4 M
2M
M/4
M
If the Earth shrinks to 50% of its real radius its mass remaining the same, the weight of a body on the Earth will ______.
decrease by 50%
increase by 50%
decrease by 25%
increase by 300%
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
Fill in the blanks
To produce a displacement ______ is required.
Passengers lean forward when a sudden brake is applied in a moving vehicle. This can be explained by ________.
By convention, the clockwise moments are taken as ______ and the anticlockwise moments are taken as_______.
______ is used to change the speed of the car.
A man of mass 100 kg has a weight of ______ at the surface of the Earth.
State whether the following statements are true or false. Correct the statement if it is false
The linear momentum of a system of particles is always conserved.
True
False
Apparent weight of a person is always equal to his actual weight
True
False
Weight of a body is greater at the equator and less at the polar region.
True
False
Turning a nut with a spanner having a short handle is so easy than one with a long handle.
True
False
There is no gravity in the orbiting space station around the Earth. So the astronauts feel weightlessness.
True
False
Match the following
| Column I | Column II |
| Newton’s I law | propulsion of a rocket |
| Newton’s II law | Stable equilibrium of a body |
| Newton’s III law | Law of force |
| Law of conservation of linear momentum | Flying nature of bird |
Mark the correct choice as
Assertion & Reasoning
- Assertion: The sum of the clockwise moments is equal to the sum of the anticlockwise moments.
- Reason: The principle of conservation of momentum is valid if the external force on the system is zero.
If both the assertion and the reason are true and the reason is the correct explanation of assertion.
If both the assertion and the reason are true, but the reason is not the correct explanation of the assertion.
Assertion is true, but the reason is false.
Assertion is false, but the reason is true.
Assertion & Reasoning
- 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.
If both the assertion and the reason are true and the reason is the correct explanation of assertion.
If both the assertion and the reason are true, but the reason is not the correct explanation of the assertion.
Assertion is true, but the reason is false.
Assertion is false, but the reason is true.
Answer briefly
Define inertia. Give its classification.
Classify the types of force based on their application.
If a 5 N and a 15 N forces are acting opposite to one another. Find the resultant force and the direction of action of the resultant force.
Differentiate mass and weight.
Define the moment of a couple.
State the principle of moments.
State Newton’s second law.
Why a spanner with a long handle is preferred to tighten screws in heavy vehicles?
While catching a cricket ball the fielder lowers his hands backwards. Why?
How does an astronaut float in a space shuttle?
Solve the given problems
Two bodies have a mass ratio of 3:4 The force applied on the bigger mass produces an acceleration of 12 ms-2. What could be the acceleration of the other body, if the same force acts on it.
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.
A mechanic unscrew a nut by applying a force of 140 N with a spanner of length 40 cm. What should be the length of the spanner if a force of 40 N is applied to unscrew the same nut?
The ratio of masses of two planets is 2:3 and the ratio of their radii is 4:7 Find the ratio of their accelerations due to gravity.
Answer in detail
What are the types of inertia? Give an example for each type.
State Newton’s laws of motion?
Deduce the equation of a force using Newton’s second law of motion.
State and prove the law of conservation of linear momentum.
Describe rocket propulsion.
State the universal law of gravitation and derive its mathematical expression.
Give the applications of universal law gravitation.
HOT Questions
Two blocks of masses 8 kg and 2 kg respectively lie on a smooth horizontal surface in contact with one other. They are pushed by a horizontally applied force of 15 N. Calculate the force exerted on the 2 kg mass.
A heavy truck and bike are moving with the same kinetic energy. If the mass of the truck is four times that of the bike, then calculate the ratio of their momenta. (Ratio of momenta = 2:1)
“Wearing helmet and fastening the seat belt is highly recommended for safe journey” Justify your answer using Newton’s laws of motion.
Solutions for 1: Laws of Motion
Samacheer Kalvi solutions for Science [English] Class 10 SSLC TN Board chapter 1 - Laws of Motion
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Concepts covered in Science [English] Class 10 SSLC TN Board chapter 1 Laws of Motion are Motion and Rest, Rocket Propulsion, Translational and Rotational Motions, Force, Inertia and Mass, Types of Inertia, Linear Momentum, Newton's First Law of Motion, Moment (Turning Effect) of a Force Or Torque, Moment of Force Or Torque, Principle of Moments, Newton's Second Law of Motion, Impulse, Newton's Third Law of Motion, Conservation of Linear Momentum and Its Principle, Newton’s Universal Law of Gravitation, Acceleration Due to Gravity (Earth’s Gravitational Acceleration), Apparent Weight, Concept of Mass and Weight, Couple.
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