Question

Sumesh went to Big Bazaar to purchase certain goods. There he has noticed an old lady struggling to carry the goods from one floor to the next. Then Sumesh took her to the lift and showed her how to operate it. The old lady was very happy.

a) What values Sumesh posses?
b) An elevator can carry a maximum load of 1800 kg is moving up with a constant speed of 2 m/s, the frictional force opposing the motion is 4000 N. Determine the minimum power delivered by motor to the elevator in Watts.

Answer 1

Dear Student,
i)Sumesh shows value of Good Character.
ii)Power by motor is given by, consider g=10m/s2

$$\begin{gathered} P=f\times v \\ f=1800\times 10+4000 \\ =22000N \\ P=22000\times 2=44000watt. \end{gathered}$$
Power delivered by motor is 44000watt.

Regards.