Explanation:
<h2>Given:</h2>m = 49.9 kg
ρ = 270 kg/m³
<h2>Required:</h2>volume
<h2>Equation:</h2>where: ρ - density
m - mass
v - volume
<h2>Solution:</h2>Substitute the value of ρ and m
Answer:
The average power provided by the tension in the cable pulling the lift is = 714 W
Explanation:
Given data
Mass = 71 kg
Change in height = 123 m
When the lift moves in upward direction then in that case kinetic energy is constant & only potential energy changes.
Change in potential energy Δ PE = m g ( )
Δ PE = 71 × 9.81 × 123
Δ PE = 85670.73 J
Time = 2 min = 120 sec
So average power is given by
Therefore the average power provided by the tension in the cable pulling the lift is = 714 W
