The amount of work done against friction to slide over first base in a straight-line across level ground depends most on the direction of the slide

the distance you slide

the speed at which you slide

the mass of the base runner

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Ответ:

donuteatingcat

02.10.2021

Physics

The surface tension is 190.2 N/m.

Explanation:

Initial radius, r = 4 cm

final radius, r' = 6 cm

Work doen, W = 15 J

Let the surface tension is T.

The work done is given by

W = Surface Tension x change in surface area

$15 = T \times 4\pi^2(r'^2 - r^2)\\\\15 = T \times 4 \times 3.14\times 3.14 (0.06^2- 0.04^2)\\\\15 = T\times 0.0788\\\\T = 190.2 N/m$

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The amount of work done against friction to slide over first base in a straight-line across level ground depends most on the direction of the slide the distance you slide the speed at which you slide the mass of the base runner