Workers pushing a 180 kg trunk across a level floor encounter a 10 m long region where the floor becomes increasingly rough; the coefficient of kinetic friction increases from μ0 = .17 to .79 according to the expression ( μk = μ0 + ax^2 ) where a = 0.00062 m^-2, and x is the distance in meters from the beginning of the rough region.
how much work does it take to push the trunk at constant speed across the region?

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?

Which is the most accurate name for the ionic compound cas?