Question

anyone give me questions of chapter 8 motion science.
give me (3 mark questions for chapter 8 motion science class 9​
I will make you brilliant if, you give me correct questions and answers​

Answer 1

Explanation:

Question 1What is the simplest type of motion

Give an example of a body which may appear to be moving for one person and stationary for the other.

Answer:-

Motion:- in a straight line.

The passengers in a moving bus observe that the trees, buildings as well as the people on the roadside appear to be moving backwards. Similarly, a person standing on the roadside observes that the bus (along with its passengers) is moving in forward direction. But, at the same time, each passenger in a moving bus or train observes, his fellow passengers sitting and not moving. Thus, we can tell that motion is relative.

2 ) questions:- Express average velocity when the velocity of a body changes at a non-uniform rate and a uniform rate.

Answer:

When the velocity of a body changes at a non-uniform rate, its average velocity is found by dividing the net displacement covered by the total time taken.

i.e., Average velocity = Net displacement Total time taken

In case the velocity of a body changes at a uniform rate, then the average velocity is given by the arithmetic mean of initial velocity and final

i.e., Average velocity = Initial velocity + Final velocity/2

3) questions:6 Differentiate between distance and displacement.

Answer:- 1) Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.

2)Distance is a scalar quantity as it only depends upon the magnitude and not the direction. Displacement is a vector quantity as it depends upon both magnitude and direction.

3)The distance can only have positive values. Displacement can be positive, negative, and even zero.

4) distance is larger depend on distance travel displacement is smaller than the distance travelled. .