A person draws $10$ kg of water from a well at a depth of $5$ m using a single fixed pulley by applying an effort of $120$ N. Find the efficiency of the machine. $(g = 10 {m s}^{- 2})$

83

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

16

No worries! We‘ve got your back. Try BYJU‘S free classes today!

66

No worries! We‘ve got your back. Try BYJU‘S free classes today!

33

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A $83$ %
$F = 120 N$
Water Height $= 5 m$
Work done by person $= 600 J$
Increase in potential energy of water $= m g h$
$= 5 * 10 * 10$
$= 500 J$

$E f f i c i e n c y = \frac{i n c r e a s e i n P . E}{W o r k d o n e}$
$= \frac{500}{600}$
$= 0.83$
$= 83$ %

Suggest Corrections

Similar questions

A man uses a single fixed pulley to lift a bucket of water from a well. The bucket and water together weigh 750N but the man has to apply an effort of 900N to lift the bucket. Calculate the efficiency of the set-up.

Q. A woman draws water from a well using a fixed pulley. The mass of bucket and water together is 6 Kg. The force applied by the woman is 70 N. calculate the mechanical advantage.

[T a k e g = 10 m s^{2}]

A boy lifts a load of 400 N through a vertical height of 5 m by a fixed pulley by applying an effort of 480 N at the other end.
Find the efficiency.

Q. Geetu draws water from a well using a fixed pulley. The mass of the bucket and water together is

6 kg

. If the force applied by her is

70 N

, calculate the mechanical advantage. (Take

g = 10 {m s}^{- 2}

)

Q. A woman draws water from a well using a fixed pulley. The mass of bucket and water together is

6 k g

. The force applied by the woman is

70 N

. What is the mechanical advantage ? (Take

g = 10 m s^{- 2}

)

Join BYJU'S Learning Program

A person draws 10 kg of water from a well at a depth of 5 m using a single fixed pulley by applying an effort of 120 N. Find the efficiency of the machine.(g=10ms−2)

The correct option is A 83%F=120NWater Height =5mWork done by person =600JIncrease in potential energy of water=mgh =5∗10∗10 =500JEfficiency=increase in P.EWork done =500600 =0.83 =83%

A person draws $10$ kg of water from a well at a depth of $5$ m using a single fixed pulley by applying an effort of $120$ N. Find the efficiency of the machine. $(g = 10 {m s}^{- 2})$

The correct option is A $83$ %
$F = 120 N$
Water Height $= 5 m$
Work done by person $= 600 J$
Increase in potential energy of water $= m g h$
$= 5 * 10 * 10$
$= 500 J$

$E f f i c i e n c y = \frac{i n c r e a s e i n P . E}{W o r k d o n e}$
$= \frac{500}{600}$
$= 0.83$
$= 83$ %