Question

An engine develops 2kw of power. How much time will it take to lift a mass of 50kg to a height of 40m? (g=10m/s²)

Answer 1

Answer:

Too difficult

Explanation:

Too difficult bro you should check book

Answer 2

Answer:

It will take 10 seconds to lift the mass.

Explanation:

We will use the following equation to solve the question,

$P=\frac{mgh}{t}$      (1)

Where,

P=power developed by an engine

m=mass of the body

g=acceleration due to gravity=10m/s²

h=height to which the body is raised

From the question we have,

Power of the engine(P)=2kW=2×10³W

The mass of the body(m)=50kg

Height to which the body is raised(h)=40m

By inserting the required values in equation (1) we get;

$2\times 10^3=\frac{50\times 10\times 40}{t}$

$t=\frac{50\times 10\times 40}{2\times 10^3}$

$t=10\ seconds$

Hence, it will take 10 seconds to lift the mass.

#SPJ3