Part A

Basic formula (you should memorize and understand)

Work = Force * distance (very simple)

force = mass * acceleration

so… Work = mad (mass * acceleration * distance)

the only thing that wasn’t told in the problem is the acceleration which is another thing you really need to memorize.

Acceleration of gravity = 9.8 m/s²

put it all together

Work = 1000 kg * 9.8 m/s² * 100 m = 980,000 kg m²/s² or 980 kJoules

Now… power = energy / time … or… power = work / time

Power = 980 kJ / 50 s = 19.6 kW

.

Elevator Motor

m=1000kg

h=100

Work Done,W by Elevator = (PE) = mgh = 1000 x 9.81 x 100

Power, P = Work Done per unit time

Since motor must lift elevator in 50s, the minimum power that the motor must supply = 1000 x 9.81 x 100 / 50 = P

- What is the missing number in the series 1, 4, 27,____, 3125? - January 31, 2023
- If sulfur has an atomic number of 16 how many covalent bonds does it form - January 31, 2023
- Did lil Kim really get her stomach pumped from all the ounces of “love juice” what was found in her stomach? - January 31, 2023