are to design an elevator for an apartment building. What minimum power output s

Question

are to design an elevator for an apartment building. What minimum power output should the electric motor have if it is to lift the elevator and a load of passengers weighing 1 of 30 m in 10 s at constant speed? 4. You 8,000 N a distance The figure shows three situations where identical blocks with the same initial speeds move along rough planar surfaces. They all eventually stop because of the friction. Rank the situations according to the amount of thermal energy created by the friction from largest to smallest. 5. 6. The figure shows a small 2.0 kg object held at rest 2.0 m below the ground level. It is released from rest and slides down and then up a frictionless ramp until it hits a spring. What is the maximurm compression of the spring? The spring constant is 800 N/m. Ground level 5.0 m

Explanation / Answer

here,

4)

Passenger weight , W = 18000 N

distance , s = 30 m

time taken , t = 10 s

as the speed is constant

the power output , P = W * s /t

P = 18000 * 30 /10 W

P = 5.4 * 10^4 W

the power output of motor is 5.4 * 10^4 W

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