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CBSE Class 11-science Answered

Why is walking up a hill difficult than on a horizontal plane
Asked by devanshu_jain | 20 Oct, 2010, 02:55: PM
answered-by-expert Expert Answer
because when you are walking up a hill you are doing work against gravity(that work is provided by biological process in your body) while walking on a horizontal plane the motion is perpendicular to force of gravity so no work is done against it.
Answered by | 20 Oct, 2010, 11:57: PM

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CBSE 11-science - Physics
Can you tell an example about a body having 0 velocity and still accelerating?
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CBSE 11-science - Physics
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CBSE 11-science - Physics
During calculation of acceleration due to gravity above the surface of earth if we assume that there is an external force opposite to that of Earth's gravity then the cos angle will be 180 between the two forces which is negative(-1), if we put the value in the equation of dw = F.dx then the final value of potential energy is positive which is not possible.how and why??
Asked by anushkaverma.25707 | 24 Aug, 2023, 07:35: PM
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CBSE 11-science - Physics
In the problem no. 34 of concepts of physics HC Verma-1 bit(a) , why is the acceleration of block B is half the acceleration of block A? And why is it that distance travelled by block B is half the distance travelled by block A?
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Asked by sakethrockzz007 | 04 Aug, 2023, 11:17: PM
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CBSE 11-science - Physics
A small spherical object having density 2P is placed inside the liquid of density P and connected to an ideal string of length l whose other end is kept fixed so that the object can move in a vertical cirlcle, minimum speed which must be given at the bottom to just complete the vertical circle.
Asked by dhruvund8769 | 04 Feb, 2023, 11:41: PM
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CBSE 11-science - Physics
For a liquid drop of radius r falling in air with terminal velocity power delivered by gravitational force is proportional to
Asked by gdeadshot85 | 12 Jan, 2023, 10:28: AM
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CBSE 11-science - Physics
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Asked by vaniimtiyaz630 | 12 May, 2022, 12:19: AM
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CBSE 11-science - Physics
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Asked by KRISHPATEL.soc | 22 Apr, 2022, 04:19: PM
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CBSE 11-science - Physics
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CBSE 11-science - Physics
Derive expression for final velocity after perfectly inelastic collision  
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