Distance and displacement for class 9th (lec 5)

  video lectures for Distance and Displacement Lecture

Question 1: A farmer walks around the boundary of a square field of side `10 M` in `40` sec. What will result from the farmer's displacement after `2` minutes and `20` seconds?

a)  `12.11 m`

b) `13.14 m`

c) `14.14 m`

d) `15 m`

Question 2: The ratio of the magnitude of displacement to distance is always 

   

(a) less than 1  

(b) greater than 1  

(c) equal to 1  

(d) less than or equal to 1

Question 3: A particle moves along a circular track of `6 m` radius such that the arc of the circular track covered subtends an angle of `30º` at the center. The distance covered by the body is 

 

(a) 𝝅 `m`  

(b) `13`𝝅 `m`  

(c) `4`𝝅 `m`  

(d) `6`𝝅 `m`

Question 4: An ant moves from one corner of a hall to the diagonally opposite corner. If the dimensions of the floor of hall are `8 m × 6 m`, the displacement of the ant is

   

(a) `14 m`  

(b) `10 m` 

(c) `28 m`  

(d) `2 m`

Question 5: The figure given below shows the displacement–time graph of the two particles `P` and `Q`. Which of the following statements is correct?

(a) Both `P` and `Q` move with uniform equal speed.

(b) `P` is accelerated and `Q` is retarded.

(c) Both `P` and `Q` move with uniform speed, but the

speed of `P` is more than the speed of `Q`.

(d) Both `P` and `Q` move with uniform speeds but the

speed of `Q` is more than the speed of `P`.

Question 6: What are the `C.G.S.`  units of distance?

a) `cm`

b) `m`

c) `km`

d) `mm`

Question 7: What are the `S.I.` units of displacement?

a) `Meter`

b) `cm`

c) `mm`

d) `km`

Question 8: A person travels `6 m` towards east, `8 m` towards north and `16 m` towards south. What is the displacement of the person?

a) `64m`

b) `36m`

c) `10m`

d) `26m`

Question 9: A  body travels in a semi-circular path of radius `7 m` as shown. If the time taken to travel from `A` to `C` is `11 s`, find the distance covered.

a) `22 m`

b) `7 m`

c) `77 m`

d) 𝝅`rm`

Question 10: A  body travels in a semi-circular path of radius `7 m` as shown. If the time taken to travel from `A` to `C` is `11 s`, find the displacement.

a) `28 m`

b) `17 m`

c) `14 m`

d) `22 m`

Answer key

Q1  (c),  Q2  (d),  Q3  (a),  Q4  (b),  Q5  (c),  Q6  (a),  Q7  (a),  Q8  (c),  Q9  (a),  Q10 (c)