A classical mechanics problem by devesh tripathi

Classical Mechanics Level 1

A kangaroo is capable of jumping to a height of 2.62 m. Determine the takeoff speed of the kangaroo.

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71.7 7.00 7.17 70.0

Devesh Tripathi by devesh tripathi , 30, India

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1 solution

Devesh Tripathi
Jun 10, 2014

Given: s=2.62 m (upward direction is taken +ve) v= 0 a= -9.8m/s² u= ? Using, v²=u²+2as So, 0²= u² + 2 (-9.8) 2.62 Solving for u,we get u=7.17m/s (answer)

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How can you say that the acceleration will be - 9.8m/s2

Paras Tejani - 6 years, 11 months ago

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That is the approximate value of g, near the surface of earth. The precise value of g depends on the location. 9.80665 m/s2 is the nominal average value at the earth's surface.

Apratim Bajpai - 6 years, 11 months ago

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