Answer this quetions If a 1200 electric iron is used
daily tor 30 minutes, how much
total electricity is consumed in the
month of April? (Ans Unit)
. Ifthe energy ofa ball falling from a
height of 10 metres is reduced by
40%, how high will it rebound?
(Ans : 6 m)
. The velocity of a car increase from
54 km/hr to 72 knvhr. How much is
the work done if the mass of the car
is 1500 kg ?
(Ans. : 131250 J)
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)
Study the vonous instances of
trasntörmauon of energy you see
around you and discuss them In