Question

5. Solve the following examples.
a. An electric pump has 2 kW power.
How much water will the pump lift
every minute to a height of 10 m?
(Ans: 1224.5 kg)
b. If a 1200 W electric iron is used
daily for 30 minutes, how much
total electricity is consumed in the
month of April?
(Ans :18 Unit)
c. If the energy of a ball falling from a
height of 10 metres is reduced by
40%, how high will it rebound?
(Ans : 6 m)
d. The velocity of a car increase from
54 km/hr to 72 km/hr. How much is
the work done if the mass of the car
is 1500 kg ?
(Ans. : 131250 J
e. Ravi applied a force of 10 N and
moved a book 30 cm in the direction
of the force. How much was the
work done by Ravi?
(Ans: 3 J)​

Answer 1

Answer:

Yes , your all answers are correct.

Step-by-step explanation:

Good job