7th Standard Syllabus & Materials
7th Standard
Tamilnadu 7th Standard Maths T2 - தகவல் செயலாக்கம் Important Questions And Answers Study Material - QB365 Set B
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - தகவல் செயலாக்கம் Important Questions And Answers Study Material - QB365 Set A
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - வடிவியல் Important Questions And Answers Study Material - QB365 Set C
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - வடிவியல் Important Questions And Answers Study Material - QB365 Set B
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - வடிவியல் Important Questions And Answers Study Material - QB365 Set A
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - இயற்கணிதம் Important Questions And Answers Study Material - QB365 Set C
Published on: 25/09/2019
Force and Motion
Download Tamil Nadu 7th 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 slope of a velocity-time graph gives _______
velocity
distance
displacement
acceleration
2.
Distance travelled by a body in a given time
is always positive
can be zero or positive
is always negative
either (a) or (c)
3.
A particle is moving in a circular path of radius r. The displacement after half a circle would be _______.
Zero
R
2 r
r / 2
4.
Distance is a ___________ quantity.
5.
The SI unit of displacement is _____________
6.
In _______ equilibrium its centre of gravity remains at the same height when it is displaced.
7.
If the velocity of an object increases with respect to time, then the object is said to be in_______ acceleration.
8.
The shortest distance between two places is_______.
9.
The velocity-time graph is a circle
10.
Uniform motion.
11.
Stability
12.
Speed of ship
13.
Displacement
14.
What are three types of stability of an object?
15.
Give one example for uniform acceleration
16.
Give some examples for vector quantity
17.
Give one example where the displacement is zero but the distance travelled is not zero
18.
All objects having uniform speed need not have uniform velocity. Describe with the help of examples.
19.
What is stability? Mention its types.
20.
Define speed Mention its formula and unit.
21.
What is centre of gravity ?
22.
Distinguish between speed and velocity.
23.
Write the differences between distance and displacement
24.
Explain the types of stability with suitable examples.
25.
A car started from rest and travelling with velocity of 20 m /s in 10 s. What is its acceleration?
1.
(d)
acceleration
2.
(b)
can be zero or positive
3.
(c)
2 r
4.
( )
scalar
5.
( )
metre (m)
6.
( )
neutral
7.
( )
positive
8.
( )
displacement
9.
Not possible.
10.
Equal distances covered in equal intervals of time
11.
Larger base area
12.
Knot
13.
Metre
14.
1. Stable equilibrium
2. Unstable equilibrium
3. Neutral equilibrium
15.
The motion of a freely falling object.
16.
Displacement, velocity, force.
17.
When an object travels is a circular path (ie. the initial and positions are same).
18.
An object moving in uniform circular motion is moving around the perimeter of the circle with a constant speed. While the speed of object is constant, its velocity is changing, Ex: Merry-go-round, roller coaster, planets orbiting the sun.
19.
Stability is a measure of the body's ability to maintain its original position.
The three types of stability are
(a) Stable equilibrium
(b) Unstable equilibrium
(c) Neutral equilibrium
20.
Speed is the rate of change of distance
Formula: Speed = distance /time
Unit is meter/second (m/s)
21.
The centre of gravity of an object is the point through which the entire weight of the object appears to act.
22.
| S.No | Speed | Velocity |
| 1. | Speed is the rate of change of distance | Velocity is the rate of change in displacement |
| 2. | Speed = distance / time | Velocity = displacement / time |
| 3. | SI unit of speed is m/s | SI unit of velocity is m/s |
| 4. | Speed = \(\frac{Distance \ travelled}{time \ taken}\) | Velocity = \(\frac{Displacement}{time \ takem}\) |
23.
| Distance | Displacement | |
| 1. | The total lenglh of a path taken by an object. | The shortest distance from the initial to the final position of an object |
| 2. | SI unit is meter | SI unit is meter |
24.
Stability:
Stability is a measure of the body's ability to maintain its original position.
The three types of stability are
(i) Stable equilibrium
(ii) Unstable equilibrium
(iii) Neutral equilibrium
Stable Equilibrium:
i) The frustum can be tilted through quite a big angle without toppling.
ii) Its centre of gravity is raised when it is displaced.
iii) The vertical line through its centre of gravity still falls within its base.
iv) So it can return to its original position.
Unstable Equilibrium:
i) The frustum will topple with the slightest tilting. Its centre of gravity is lowered when it is displaced.
ii) The vertical line through its centre of gravity falls outside its base.
.JPG)
Neutral Equilibrium:
(i) It causes frustum to topple.
(ii) The frustum will rolls about but does not topple.
(iii) Its centre of gravity remains at the same height when it is displaced.
(iv) The body will stay in any position to which it has been displaced.
.JPG)
25.
Final velocity (v) = 20 m/s Initial Velocity (u) = 0 m/s.
Time (t) = 10 s
Acceleration (a) =?
\(\text { Acceleration } =\frac{\text { Change in velocity }}{\text { time }} \)
\(=\frac{\text { Final velocity }(\mathrm{v})-\text { Initial velocity }(\mathrm{u})}{\text { time }}=\frac{\mathrm{v}-\mathrm{u}}{\mathrm{t}}=\frac{20-0}{10} \)
Acceleration of the car = 2 m/s2.
7th Standard Syllabus & Materials
7th Standard
Tamilnadu 7th Standard Maths T2 - இயற்கணிதம் Important Questions And Answers Study Material - QB365 Set B
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - இயற்கணிதம் Important Questions And Answers Study Material - QB365 Set A
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - அளவைகள் Important Questions And Answers Study Material - QB365 Set C
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - அளவைகள் Important Questions And Answers Study Material - QB365 Set B
Tamilnadu Stateboard 7th Standard Subjects
Tamilnadu Stateboard Standards
