- #1
rockchalk1312
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A worker pushed a 23 kg block 13 m along a level floor at constant speed with a force directed 22° below the horizontal. If the coefficient of kinetic friction between block and floor was 0.40, what were (a) the work done by the worker's force and (b) the increase in thermal energy of the block-floor system?
Fh=Fcos(-22)
Fv=Fsin(-22)
To calculate the normal force I need both the gravitational force and the vertical component of the worker's force, and for horizontal work I also obviously need the horizontal component of their force. So how do I find either of those if I'm not given the magnitude of the worker's force?
Fh=Fcos(-22)
Fv=Fsin(-22)
To calculate the normal force I need both the gravitational force and the vertical component of the worker's force, and for horizontal work I also obviously need the horizontal component of their force. So how do I find either of those if I'm not given the magnitude of the worker's force?