Motion and Rest class 9th (lec 4)

  video lectures for basic math

Question 1: If a body does change its position concerning its surrounding, it is said to be at

a) distance

b) position 

c) rest

d) motion

Question 2: The rest state and motion of the body are.

a) non-relative 

b) not related 

c) relative

d) none of above

Question 3: Retardation is a _____ quantity.

a) scalar

b) vector

c) both

d) none of above

Question 4: Which one of the following graphs indicates that the body is at rest?

Question 5: Which of the following graphs given below is impossible?

Question 6: Which physical quantity is plotted on X-axis for all types of graphs representing motion of a body?

Answer key

Q 1 (d), Q 2 (c), Q 3 (a), Q 4 (4), Q 5 (3)

Q 6 Answer: Time is plotted on the X-axis. Speed is plotted on the Y-axis. A straight horizontal line on a speed-time graph means the speed is constant throughout.