优质解答
功 W=FS
W有用=Gh=W总-W额=ηW总 斜面:W有用= Gh
2、额外功:W额= W总-W有用=G动h(忽略轮轴摩擦的动滑轮、滑轮组)
斜面:W额=f L
3、总功公式:W总=W有用+W额=FS= W有用/η
斜面:W总= fL+Gh=FL
功 W=FS
W有用=Gh=W总-W额=ηW总 斜面:W有用= Gh
2、额外功:W额= W总-W有用=G动h(忽略轮轴摩擦的动滑轮、滑轮组)
斜面:W额=f L
3、总功公式:W总=W有用+W额=FS= W有用/η
斜面:W总= fL+Gh=FL