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CBSE Class 9 Answered

what is the force of reaction of ground?
Asked by aayushibansal1993 | 26 Sep, 2008, 05:36: PM
Expert Answer

When our feet or any any object exerts a force on the groung then as per Newton's third law , the ground also exerts an equal and opposite force known as normal reaction.

Answered by | 26 Sep, 2008, 11:34: PM
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CBSE 9 - Physics
solve this problem
Asked by kunaljat51 | 24 Jul, 2022, 10:25: PM
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CBSE 9 - Physics
a bus accelerates at 2m per second for first 10 second after the start and retards at 1m per second for next 10 second find the total distance covered by the bus
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CBSE 9 - Physics
Questions 23-25 are based on the information given below. Read the information and answer the questions that follow:A bob of mass ‘m’ is suspended by a string, g be the acceleration due to gravity the bob.When the bob is stationary, the tension ‘T’ in the string is T=mg.When the bob is pulled up with an acceleration ‘a’ the tension in the string is given by T= m (g + a)When the bob is allowed to move down with an acceleration ‘a’, the tension T in the string is given byT= m (g –a)  
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CBSE 9 - Physics
The weight of a boy on the surface of earth is 294N. Find its mass.
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CBSE 9 - Physics
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Asked by aanchishraddha | 16 Nov, 2021, 09:27: PM
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CBSE 9 - Physics
A boy of mass 45 kg running 6 m/s jumps onto a 30 kg trolley moving in the same direction at 1.5 m/s. Their common velocity will be: A. 4.0 m/s B. 4.2 m/s C. 6.5 m/s D. 8.3 m/  
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CBSE 9 - Physics
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CBSE 9 - Physics
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CBSE 9 - Physics
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CBSE 9 - Physics
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Asked by sreesaie2008 | 01 Aug, 2021, 06:12: AM
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