Calculating Velocity when Stuntman Jumps from 1.25m Height

Thread starter Istiak
Start date Aug 16, 2021
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Classical mechanics Height Motion Velocity

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A stuntman jumped from a height of 1.25 meters and landed 10 meters away, prompting a discussion on calculating his initial velocity. The initial calculations suggested a velocity of 20 m/s, but this was identified as the average speed rather than the initial velocity. The conversation highlighted the importance of understanding vector components, noting that the horizontal component of velocity remains constant while the vertical component changes due to gravity. Participants clarified that gravitational force affects vertical motion but not horizontal motion, leading to confusion about forces acting on the stuntman. Ultimately, the discussion emphasized the need for a proper understanding of motion in two dimensions to accurately determine the initial velocity.

Aug 19, 2021

Delta2

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Istiakshovon said:

But, If I think of hypotenuse then, there is force

Yes there is force along the hypotenuse, there is a component of the gravitational force along that way. But we usually talk about this component when we have an inclined plane, here we have a different case, and as I told you before the trajectory of the cyclist is not along the hypotenuse.