Ask a Doubt
Request a call back

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

CBSE Class 9 Answered

An object starting from rest travels 20m in the first 2s and 160m in the next 4s. What will be the velocity after 7s from the start?
Asked by sudip.mondal09 | 20 May, 2021, 10:37: AM
answered-by-expert Expert Answer

Given data:
u = 0 m/s; s = 20 mt = 2 s
We use the formula s = ut + (1/2)at2
Substituting the values, we get
a = 10 m/s2
 
At t = 7 seconds
v = u + a t ,
→ v = 0 + a t
       = 10 x 7 
→ v = 70 m/s

Answered by Shiwani Sawant | 20 May, 2021, 12:22: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 9 - Physics
what is derivation
Asked by janhavisoni2099 | 02 Oct, 2023, 05:20: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
A body moving with uniform acceleration  travels 84m in 6seconds and 264m in 11seconds.  Find acceleration and initial velocity? (In detail)
Asked by sagrawal0081 | 18 Aug, 2023, 05:04: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
question 1) A body is projected vertically upwards from top of the tower with the velocity of 30m/s. if it takes 8sec to reach on ground then what is the height of the tower (g=10ms). what is the total distance travelled by the body. question 2) A body is dropped from the height of h covers by 64% distance in its last second.find out thte total tim of the ball and height. question 3) A body projected vertically upward, At the half  of its maximum height its velocity becomes 20m/s, what is the maximum height attained by the body. question 5) A body is projected vertically upward from ground. the time of flight is 8 sec find the velocity of projection.
Asked by ketkiparasgandhi | 05 Jul, 2023, 08:02: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
can velocity be constant with acceleration?
Asked by adityatripathi84418 | 02 May, 2023, 10:29: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
A car is traveling with a speed of 54 km/hr the driver applies the break and retards the car uniformly.the car is stopped in 5 seconds 1) The redardation of the car 2)Distance travelled before it is stopped after apply the break
Asked by rsaranya658 | 30 Jun, 2022, 02:44: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
...
question image
Asked by sanskargunjkar01 | 26 Jun, 2022, 09:13: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
how is equation if motion is formed in graphical method
Asked by poornimaram165 | 21 Jun, 2022, 09:16: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
A ball thrown up vertically returns to the earth after 12 seconds. Find the velocity with which it was thrown up.
Asked by saanidhyapatil | 16 Feb, 2022, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
Equation for position time relation
Asked by pradeepkumarbhegde5175 | 12 Jan, 2022, 11:25: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
Two balls are dropped to the ground from different heights. one ball is dropped two second after the other but both hit the ground at the same time if the first ball takes 6 second to reach the ground then what is the initial difference between their heights take g is equal to 10 metre per second square
Asked by debargharoy057 | 25 Sep, 2021, 09:48: AM
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
×