give some 20 questions related to chapter motion class 9
Answers
Answer:
Question 1.
The phenomenon of motion was placed on a sound scientific footing by two scientists. Write their names.
Answer:
Galileo Galilei and Isaac Newton.
Question 2.
Are rest and motion absolute or relative terms?
Answer:
They are relative terms.
Question 3.
Suppose a ball is thrown vertically upwards from a position P above the ground. It rises to the highest point Q and returns to the same point P. What is the net displacement and distance travelled by the ball?
Answer:
Displacement is zero. Distance is twice the distance between position P and Q.
Question 4.
Which speed is greater: 30 m/s or 30 km/h?
Answer:
30 m/sQuestion 5.
What do you mean by 2 m/s2?
Answer:
The velocity of the body increases by 2 m/s after every second.
Question 6.
Can uniform linear motion be accelerated?
Answer:
No
Question 7.
Define one radian.
Answer:
It is the angle which is subtended at the centre by an arc having a length equal to the radius of the circle.
Question 8.
What is the relation between linear velocity and angular velocity?
Answer:
Linear velocity = Angular velocity × Radius of circular path.
Question 9.
Give an example when we infer the motion indirectly.
Answer:
We infer the motion of air by observing the movement of dust particles or leaves and branches of trees, or simply by feeling the blowing air on our face.
Question 8.
What is the relation between linear velocity and angular velocity?
Answer:
Linear velocity = Angular velocity × Radius of circular path.
Question 9.
Give an example when we infer the motion indirectly.
Answer:
We infer the motion of air by observing the movement of dust particles
Explanation:
hope it's enough for uh
Explanation:
1) The phenomenon of motion was placed on a sound scientific footing by two scientists. Write their names.
2) Are rest and motion absolute or relative terms?
3)Suppose a ball is thrown vertically upwards from a position P above the ground. It rises to the highest point Q and returns to the same point P. What is the net displacement and distance travelled by the ball?
4) Which speed is greater: 30 m/s or 30 km/h?
5)What do you mean by 2 m/s2?
6)Can uniform linear motion be accelerated?
7)Define one radian?
8)What is the relation between linear velocity and angular velocity?
9)Give an example when we infer the motion indirectly.
10)What is essential to describe the position of an object?
11) What is the simplest type of motion?
12)What indicates the motion of the earth?
13)If the displacement of a body is zero, is it necessary that the distance coyered by it is also zero?
14)Can the displacement be greater than the distance travelled by an object?
15)
When do the distance and displacement of a moving object have the same magnitude?
16) what is speedometer
17)what is odometer
18)A body is moving with a velocity of 10 m/s. If the motion is uniform, what will be the velocity after 10 s?
19)Can a body have constant speed but variable velocity?
20)How are the distances travelled by an object related to the time taken when an object travels equal distances in equal intervals of time?