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Important Questions and answers on Motion for Class 9 physics -6







In this page we have Important Questions and answers on Motion for Class 9 physics -6 . Hope you like them and do not forget to like , social shar and comment at the end of the page.

Question 1

Below Figure represents the speed time graph for a particle. Find the distance covered by the particle

a) between t= 30min. and t= 40min.

b) between t=10 min and t=40 min

c) what is the speed of the particle




Question 2

A particle starts from rest and moves with a uniform acceleration of 5m/s2 for 10s and then it moves with a constant velocity for 4s. Later it slows down and comes to rest in 5s. Draw the velocity graph for the motion of the body and answer the following questions:

a) What is the maximum velocity attended by the body?

b) What is the distance travelled during this period of acceleration?

c) What is distance travelled when the body was moving with constant velocity?

d) What is the retardation of the body while slowing down?

e) What is the distance travelled by retarding?

f) What is the total distance travelled?



Question 3

Two object are thrown vertically upwards simultaneously with their velocities x and y respectively. Prove that

a) The heights reached by them would be in the ratio of a2: b2

b) The time taken to reach the maximum height would be in the ration of a:b

(Assume upward acceleration is –g and downward acceleration to be +g).


Question 4

True and false questions

a) Displacement cannot be zero

b) Average speed= Total distance/time

c) Average velocity = Total displacement /time

d) slope of distance-time graph indicates the speed

e) It is possible to have Object moving with uniform speed but variable acceleration.

f) It is possible to have Object moving with uniform velocity but non-uniform acceleration.


Question 5

Find the distance covered by a particle during the time interval t=0 and t=4s for which the speed time graph is shown in figure





Question 6

Figure shows distance time graph of three objects A ,B and C

a) which object is moving with a greater speed

b) which object is moving with slowest speed



Question 7

Marc runs from one end to the other end of a semicircular track whose radius is 140m. What is the distance covered by the marc and what is his displacement? 
Question 8

A jogger moves 500m in 2 minutes and next 1000m in 30s on the same straight path. What is his average speed and average velocity?


Question 9

A big truck moving along a straight line at a speed of 54km/hr stop in 5s after the breaks are applied.
  1. Find the acceleration, assuming it to constant.
  2. Plot the graph of speed versus time.
  3.   Using the graph. Find the distance covered by the car after the brakes are applied?

Question 10

A swimmer swims 90m long pool. He covers the distance of 180m by swimming from one end to other end back along the same path. If he covers the first 90m at speed of 2m/s, then how fast he swim so that his average speed is 3m/s?


Question 11

a) Write the difference between Distance and displacement

b) Write the difference between Uniform and Non uniform Motion


Question 12

Lori moves 4m due east and then 3m due west.
  1. What is the distance covered by the Lori?
  2. What is its displacement?

Question 13

A car moves at a speed of 40km/h, It is stopped by applying brakes which produces a uniform acceleration of -0.6m/s2. How much distance will the vehicle move before coming to stop?

Question 14

A person walks along the sides of a square field. Each side is 10m long. What is the maximum magnitude of displacement of the person in any time interval?


Answer

1) 2.5 km,7.5 km, 15 km/hr

2) (a) 25m/s, (b) 6.25m, (c) 100m, (d) 5m/s2, (e) 62.5m, (f) 225m

4) a) false b) True c) True d) True e) false f) true

5) 40 m

6) A, C

7) Distance= 220m, Displacement= 140m

8)  10 m/s

9) a) – 3m/s2  c) 37.5 m

10) 6 m/s

12) 7 m ,1 m

13) 102.87 m

14) 10(2)1/2



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