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![Samacheer Kalvi solutions for Science - Term 1 [English] Class 7 TN Board chapter 2 - Force and Motion - Shaalaa.com](/images/science-term-1-english-class-7-tn-board_6:5f2b1b2038084cf381bfa42c826a928c.jpg "Samacheer Kalvi solutions for Science - Term 1 [English] Class 7 TN Board chapter 2 - Force and Motion")
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Solutions for Chapter 2: Force and Motion
Below listed, you can find solutions for Chapter 2 of Tamil Nadu Board of Secondary Education Samacheer Kalvi for Science - Term 1 [English] Class 7 TN Board.
Samacheer Kalvi solutions for Science - Term 1 [English] Class 7 TN Board 2 Force and Motion Evaluation [Pages 25 - 26]
Choose the best answer.
A particle is moving in a circular path of radius r. The displacement after half a circle would be
Zero
R
2r
r/2
Which of the following figures represent uniform motion of a moving object correctly?
Suppose a boy is enjoying a ride on a merry go round which is moving with a constant speed of 10 m/s. It implies that the boy is
at rest
moving with no acceleration
in accelerated motion
moving with uniform velocity
From the given v-t graph it can be inferred that an object is
in uniform motion
at rest
in non - uniform motion
moving with uniform accelerations
How can we increase the stability of an object?
Lowering the centre of gravity
Raising the centre of gravity
Increasing the height of the object
Shortening the base of the object
Fill in the blanks.
The shortest distance between two places is ______.
The rate of change of velocity is ______.
If the velocity of an object increases with respect to time, then the object is said to be in______ acceleration.
The slope of the speed–time graph gives ______.
In ______ equilibrium, the centre of gravity remains at the same height when it is displaced.
Match the following.
| 1. | Displacement | Knot |
| 2. | Light travelling through vacuum | Geometric centre |
| 3. | Speed of ship | Metre |
| 4. | Centre of gravity of geometrical shaped objects | Larger base area |
| 5. | Stability | Uniform velocity |
Analogy
Velocity : metre/second :: Acceleration : ______.
Length of scale : metre :: Speed of aeroplane : ______.
Displacement / Time : Velocity :: Speed / Time : ______.
Answer very briefly.
Asher says all objects having uniform speed need not have uniform velocity. Give reason.
Saphira moves at a constant speed in the same direction. Rephrase the same sentence in fewer words using concepts related to motion.
Correct your friend who says that acceleration gives the idea of how fast the position changes.
Answer briefly.
Show the shape of the distance – time graph for the motion in the following cases.
- A bus moving with a constant speed.
- A car parked on a road side.
Distinguish between speed and velocity.
What do you mean by constant acceleration?
What is centre of gravity ?
Answer in detail.
Explain the types of stability with suitable examples.
Write about the experiment to find the centre of gravity of the irregularly shaped plate.
Numerical problems.
Geetha takes 15 minutes from her house to reach her school on a bicycle. If the bicycle has a speed of 2 m/s, calculate the distance between her house and the school.
A car starts from rest and it is travelling with a velocity of 20 m/s in 10 s. What is its acceleration?
A bus can accelerate with an acceleration of 1 m/s2 . Find the minimum time for the bus to attain the speed of 100 km/s from 50 km /s.
Fill in the boxes.
| S.No | First Move | Seconde Move | Distance (m) | Displacement |
| 1. | Move 4 metres east | Move 2 metres west | 6 | 2 m east |
| 2. | Move 4 metres north | Move 2 metres south | ||
| 3. | Move 2 metres east | Move 4 metres west | ||
| 4. | Move 5 metres east | Move 5 metres west | ||
| 5. | Move 5 metres south | Move 2 metres north | ||
| 6. | Move 10 metres west | Move 3 metres east |
Solutions for 2: Force and Motion
Samacheer Kalvi solutions for Science - Term 1 [English] Class 7 TN Board chapter 2 - Force and Motion
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Concepts covered in Science - Term 1 [English] Class 7 TN Board chapter 2 Force and Motion are Types of Speed, Types of Velocity, Types of Acceleration, Velocity - Time Graphs, Comparison Between Distance – Time and Speed – Time Graphs, Centre of Gravity, Equilibrium of Bodies and Its Types, Distance and Displacement, Speed, Velocity, Acceleration and Retardation, Acceleration and Retardation, Graphical Representation of Motion, Displacement - Time Graph Or Distance - Time Graph.
Using Samacheer Kalvi Science - Term 1 [English] Class 7 TN Board solutions Force and Motion exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. The questions involved in Samacheer Kalvi Solutions are essential questions that can be asked in the final exam. Maximum Tamil Nadu Board of Secondary Education Science - Term 1 [English] Class 7 TN Board students prefer Samacheer Kalvi Textbook Solutions to score more in exams.
Get the free view of Chapter 2, Force and Motion Science - Term 1 [English] Class 7 TN Board additional questions for Mathematics Science - Term 1 [English] Class 7 TN Board Tamil Nadu Board of Secondary Education, and you can use Shaalaa.com to keep it handy for your exam preparation.
