Question

(0)
LICOU
D110
Po
5.
What kind
(a) Electric heater
(d) Microphone
(g) Steam engine
(e) Headphone
(h) Solar battery
(
(i) Battery
(b)
A man of
Height o
A bullet
A stond
energy
ve
6.
reduced to half?
7.
How
fron
8.
moving water in power station.
direction of the applied force.
IA
10. A
9.
13 marks
E.
2.
C. Long answer questions.
How does energy transformation take place in the following examples?
(a) A transistor operated with battery,
(b) Lighting the electric lamp.
(c) Moving a car from rest position.
A man raises 10 bricks on the roof in 15 minutes. A boy raises 10 bricks on the
in 30 minutes. Which of them does more work? Which of them has more power?
Explain how a body having energy can do work?
2.
same
3
D) Hydroelectric power
What happens to the kinetic energy when the mass of a body is doubled but the
Name the sequence of energy change taking place in the production of electric
Find out the work done, when a force of 40 N displaces a body through 5
What is the kinetic energy of a body of mass 1 kg moving with a speed of 4m/s)​

Answer 1

Answer:

mass=1kg

speed=4m/s

kinetic energy=1/2mv^2

K. E=1/2 *1* 4

hence, K. E= 2 joule

hope it helps u