A student connects a 300 kg container to a rope and pulley system and then connects the rope to a motor. If the student wants to lift the container 10.0 m in 2.0 min, what average power rating is required?

To develop this problem, we will apply the concepts related to Power, which is defined as the energy unit of a body per unit of time. Mathematically it can be written as,

In this case the Energy is equivalent to the potential energy accumulated by the body therefore,

Replacing with our data and taking the units to the International System we have to,

Therefore the average power rating required is 245W

come closer and become far apart and become steam/gas

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day