How Much Work Is Required to Push a 10 kg Steel Block Across a Table?

[kraaaaamos]

Homework Statement

a. How much work must you do to push a 10 kg block of steel across a steel table at a steady speed of 1.0 m/s for 3 s? The coefficient of kinetic friction for steel on steel is 0.60.

b. What is your power output while doing so?

Homework Equations

W = Fd (where d = distance)
F = (fric. coeff)N (where N=normal force)
Normal force in this case = weight
w = mg

P = Fv

The Attempt at a Solution

a) w = mg
= 10(-9.8)
= -98

N = 98

F = (fric. coeff)(N)
= (0.6)(98)
= 58.8

W = Fd d = 3m
= (58.8)(3)
= 176.4 J

b)
P=Fv
= (58.8)(1)
=58.8W

 

[Bill Foster]

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