Click the correct answer (True or False).
Click the correct answer.
What is the SI unit of energy?
newton
newton/metre
joule
newton (metre)2
Which of the following energy conversion takes place in a washing machine?
Electrical energy is converted into mechanical energy.
Electrical energy is converted into sound energy.
Electrical energy is converted into heat energy.
Electrical energy is converted into chemical energy
Which of the following energy gets transformed into electrical energy in a dry cell?
chemical energy
mechanical energy
sound energy
kinetic energy
If the velocity of a ball is increased twice, what is the change in its kinetic energy(KE)?
Its KE increases by two times.
Its KE increases by three times.
Its KE increases by four times.
Its KE increases by nine times.
Which of the following is not true about energy?
It is the capacity to do work.
Its SI unit is joule (J).
It can be converted from one form to another.
It cannot be stored.
Click the correct answer.
As the speed of a body becomes three times, its kinetic energy increases by
.
3 times
9 times
1/3 times
1/9 times
If the mass of a body is halved, its potential energy becomes
.
half
double
four times
one-fourth
1 watt =
9.8 J s
1 J s
9.8 J s-1
1 J s-1
The gravitational potential energy increases as the
.
height of the object decreases with respect to ground
height of the object increases with respect to ground
speed of the object increases
speed of the object decreases
Work is said to be done when a
moves a body in its own direction.
pressure
displacement
force
energy
The kinetic energy depends on the mass of the body and
of the body.
density
velocity
force
height
