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CBSE Class 9 Answered

a ball is dropped from height of 5m ontoa sandy floor and penetrates the sand up to 10cm before coming to rest.find the retardation of the ball assuming it to be uniform?
Asked by manvendra singh | 19 Nov, 2013, 08:16: PM
answered-by-expert Expert Answer
Answered by Faiza Lambe | 19 Nov, 2013, 08:59: PM

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CBSE 9 - Physics
The average speed of a moving body can never be zero but the average velocity of a moving body can be zero. Justify.
Asked by mailtoparvathyprajith | 06 Feb, 2024, 09:50: PM
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CBSE 9 - Physics
  Arrange the following speeds in increasing order(keeping the least speed first): (i) An athlete running with a speed of 10m/s. (ii) An bicycle moving with a speed of 200m/min. (iii) An scooter moving with a speed of 30km/h
Asked by mailtoparvathyprajith | 06 Feb, 2024, 09:10: PM
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CBSE 9 - Physics
what is motion
Asked by kamalsonkar | 29 Jan, 2024, 11:31: AM
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CBSE 9 - Physics
when velocity becomes zero
Asked by sapnamantri05 | 24 Nov, 2023, 04:54: PM
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CBSE 9 - Physics
colliodal example
Asked by ashrithpandu84 | 09 Oct, 2023, 08:09: PM
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CBSE 9 - Physics
what is derivation
Asked by janhavisoni2099 | 02 Oct, 2023, 05:20: PM
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CBSE 9 - Physics
If mass of two object is same, than .. a) inertia will be same b) inertia will be different c) momentum will be same. d) momentum will be different
Asked by durgesh21332 | 06 Sep, 2023, 06:17: PM
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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
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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
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CBSE 9 - Physics
define motion provide example of an object in motion  
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Asked by leena3732 | 15 Jun, 2023, 09:42: AM
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