Question

An engine produces a power of 20 KW. How long will
it take to carry 400 kg mass to 40 metre height ?
(g=10m/s)​

Answer 1

$\huge{\underline{\texttt{\blue{QUESTION:}}}}$

An engine produces a power of 20 KW. How long will it take to carry 400 kg mass to 40 metre height ?

(g=10m/s^2)

$\huge{\underline{\texttt{\green{ANSWER:}}}}$

Given

$\begin{cases}</p><p>Mass = 200 kg \\ h = 40 \\ g = 10 m/s^2</p><p>\end{cases}$

$\boxed{Power = 10000 W}$

Work = mgh

= 200 × 10 × 40

= 80000

$\therefore$

$time = \frac{work}{time} = \frac{80000}{10000} = 8 \: seconds$

_________________________

Answer 2

Answer:

Given

\begin{lgathered}\begin{cases} Mass = 200 kg \\ h = 40 \\ g = 10 m/s^2 \end{cases}\end{lgathered}

⎩

⎪

⎨

⎪

⎧

Mass=200kg

h=40

g=10m/s

2

\boxed{Power = 10000 W}

Power=10000W

Work = mgh

= 200 × 10 × 40

= 80000

\therefore∴

time = \frac{work}{time} = \frac{80000}{10000} = 8 \: secondstime=

time

work

=

10000

80000

=8seconds

_________________________

Explanation:

hope its help you