What Is the Difference in Work Needed to Push a 100

question 7

Multiple Choice

What is the difference in work needed to push a 100 kg crate (at constant speed) a distance of 2 m along an inclined plane that is at an angle of 20 degrees with the horizontal,if the coefficient of kinetic friction was equal to 0.20 or zero?

• A)670 N
• B)1040 N
• C)no difference
• D)370 N
• E)134 N

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