Motion, Force, Work and Energy
Question: A tube well pumps out 2400 kg of water per minute. Water is coming out with a velocity of 3 m/s. What is the power of pump?
A - 980 W
B - 180 W
C - 780 W
D - 680 W
Answers
Answered by
2
Answer:
bahi abhi toh sirf 10th mey hun 11 mey aane ke baad iska answer bolunga
Answered by
1
Answer:
Options D is ans
Explanation......Mark me as brainliest
The value of the discharge of water through pump is
Q
o
u
t
=
2400
k
g
/
m
i
n
=
40
k
g
/
s
e
c
The velocity of the water coming out is
v
o
u
t
=
3
m
/
s
2
The value of the time is
T
=
10
h
o
u
r
s
=
10
×
60
×
60
s
e
c
The expression for the work done in terms of kinetic energy is
W
.
D
=
1
2
m
v
2
W
.
D
t
=
1
2
m
v
2
t
The expression for the power is,
The expression for the power is,
P
=
W
.
D
t
=
(
1
2
×
m
t
×
v
2
)
(
t
)
=
1
2
m
v
2
Substitute the value in the above equation
P
=
1
2
×
40
×
3
2
=
180
W
Total work done in 10 hours is
W
.
D
=
T
×
P
Substitute the value in the above equation
W
.
D
=
10
×
60
×
60
×
180
=
6480000
J
=
6480
k
J
Thus the value of the work done is
6480
k
J
Similar questions