Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 9 Answered

Answer the following questions based on the graph given below.  (a) Calculate the acceleration between the points A and B. (b) Calculate the retardation between the points C and D. (c) Calculate the distance travelled till point A and from the points C to D.
Asked by Topperlearning User | 18 May, 2015, 01:13: PM
answered-by-expert Expert Answer

a) Between points A and B; u = 10 m/s, v = 30 m/s and t = 100 s.

Thus, we have
a = (v-u)/t
a = (30 - 10)/100
a = 0.2ms-2
 
(b) Between the points C and D; u = 30 m/s, v = 5 m/s and t = 50 s.
a = (v-u) /t
a= (5 - 30)/50
a = -0.5ms-2
 
(c) Distance travelled till point A = Area of the highlighted rectangle
                                                   = 10ms-1 x 150s = 1500 m = 1.5 km
 
Distance from C to D = Area of higlighted triangle = [1/2] x time x speed
                                   = [1/2] x 25 ms-1 x 50 s = 625 m
Answered by | 18 May, 2015, 03:13: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 9 - Physics
Time- 0 10 20 30 40 50 Speed- 5 10 15 20 25 30 Find the distance travelled in 50 seconds
Asked by akshatdhamija1409 | 15 Jul, 2022, 11:16: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
Starting from rest, an object is uniformly accelerated to a speed of 60m/s in 20s. The object travels with this speed for next 40s and is then brought to rest by a uniform retardation in the next 30s.Sketch velocity time graph and calculate the acceleration, retardation and the total distance travelled. Hint: acceleration =rate of change of velocity.  distance covered =area under velocity-time graph .
Asked by chaitanyas5425 | 10 Nov, 2021, 09:16: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
what is velocity time graph
Asked by akakhilesh15597 | 16 Sep, 2021, 08:37: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
  What information can you get from velocity time graph of an object’s motion? Write three points at least. 
Asked by jasmine09.05.2007 | 10 Jul, 2021, 07:47: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
Please solve the given question
question image
Asked by ak7829426179 | 24 Sep, 2020, 08:05: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
What is accerlated motion??
Asked by himani.299 | 28 Aug, 2020, 12:06: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
A car is moving with a velocity of 7m per second it's velocity decreasing at the rate of 2.5 metre per second s square. What
Asked by dishasarma2016 | 04 Jul, 2020, 09:15: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
A racing car starts from rest and has uniform acceleiation of 5m/sec ^2.If it travels for 20sec  ,find the final velocity at this instant  
question image
Asked by jsrashokkumar1978 | 30 May, 2020, 12:10: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
The velocity-time graph (v-t) of a car moving along a level road is shown below.Find the average speed of the car in the time interval 0 to 8 s.
question image
Asked by Santosh.kumar0317 | 25 Aug, 2019, 02:15: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
Draw v-t with the data given below and answer the questions below velocity (m/s) 0 10 20 30 20 10 0 time (s) 0 5 10 15 20 25 30 1. Calculate the acceleration during 0 to 15 seconds  2.calculate the acceleration during last 15 seconds    3. Calculate the total distance travelled by the object   
Asked by Anushivashv2 | 23 Jul, 2018, 04:37: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×