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CBSE Class 9 Answered

Please solve question no 23 with proper explanation 
Asked by adityaahuja099 | 26 Nov, 2017, 03:45: PM
answered-by-expert Expert Answer
t o t a l space w o r k space d o n e space equals space t o t a l space e n e r g y space s p e n t space equals space m g h plus 1 half m v squared p o w e r space equals fraction numerator m g h plus 1 half m v squared over denominator t end fraction space equals fraction numerator 800 x 9.8 x 10 space plus begin display style 1 half end style x 800 x 20 squared over denominator 60 end fraction space equals 4000 space w a t t 1 h p space equals space 756 space w a t t 4000 space w a t t space equals space 5.36 space h p
Answered by Gajendra | 06 Dec, 2017, 03:07: PM

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CBSE 9 - Physics
An object of mass 1kg is falling from the height h=10m.calculate a) the total energy of an object at h=10m b) potential energy of the object when it is at h=4m c) kinetic energy of the object when it is at h=4m d) what will be the speed of the object when it hits the ground
Asked by mailtoparvathyprajith | 08 Feb, 2024, 06:45: PM
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CBSE 9 - Physics
when an arrow is shot from its bow it has kinetic Energy. From where does it get the kinetic Energy
Asked by mailtoparvathyprajith | 06 Feb, 2024, 08:44: PM
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CBSE 9 - Physics
Calculate the work required to be done to stop a car of 1500 kg moving at a velocity of 60 km hour
Asked by vkjainj56 | 30 Nov, 2023, 12:00: AM
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CBSE 9 - Physics
kinematics
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Asked by palagarapapamma1982 | 26 Sep, 2023, 08:50: PM
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CBSE 9 - Physics
what is energy
Asked by divyanshu.3082007 | 03 Feb, 2022, 05:21: PM
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CBSE 9 - Physics
did the kilometer is a SI unit of measurement
Asked by contactus.topperlearning | 03 Oct, 2020, 07:18: AM
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CBSE 9 - Physics
Which energy source is renewable  
Asked by Pm2895089 | 17 May, 2020, 10:09: AM
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CBSE 9 - Physics
Please solve. 
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Asked by kiranbora10 | 02 Apr, 2020, 12:42: PM
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CBSE 9 - Physics
When do we say that work is done ?
Asked by kavitavinaysharma | 23 Jan, 2020, 10:01: PM
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CBSE 9 - Physics
What is potential energy,kinetical energy,power?
Asked by mohammedfayas007 | 17 Jan, 2020, 09:17: PM
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