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Sagot :
The work done against friction as the mass slides is 8 J.
The given parameters:
- sliding mass, m = 5.0 kg
- distance traveled by the mass, s = 9.0 m
- height of incline, h = 2.0 m
- time of motion, t = 3.0 s
- kinetic energy of the object, K.E = 90 J
The work done against friction as the mass slides can be determined by applying work-energy theorem.
[tex]\Delta E= W\\\\P.E - K.E = W[/tex]
the change in mechanical energy of the sliding mass, is equal to energy lost to friction.
[tex]W = P.E - K.E\\\\W = mgh - K.E\\\\W = (5 \times 9.8 \times 2) - 90\\\\W = 98 - 90\\\\W = 8 \ J[/tex]
Thus, the work done against friction as the mass slides is 8 J.
Learn more about work-energy theorem here:https://brainly.com/question/10063455
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