Answer :
The power required to lift it is a vertical distance of 50 min and a time of 20 if there is a constant frictional force of 1750 n is 51.875kW.
Total force =m×g+friction = 19000+1750=20750
v=50/20 =2.5 m/s
Power required = F×v = 20750×2.5 = 51875=51.875kW
Friction is the pressure resisting the relative movement of stable surfaces, fluid layers, and fabric elements sliding against each other. Friction is the force that resists motion when the surface of one object comes in touch with the surface of another. The mechanical benefit of a device is reduced by means of friction, or in other phrases, the ratio of output to entry is reduced due to friction.
While surfaces in touch flow relative to every other, the friction among the 2 surfaces converts kinetic power into thermal power (that is, it converts paintings to warmness). This property could have dramatic outcomes, as illustrated through the usage of friction created by using rubbing pieces of timber together to begin a fireplace. Kinetic electricity is transformed to thermal electricity every time motion with friction happens, for example, whilst a viscous fluid is stirred. some other crucial outcome of many varieties of friction may be wear, which may additionally cause overall performance degradation or damage to additives.
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