Work and Energy

Everyday Science
What kind of energy is stored in the water of a dam?
kinetic energy
potential energy
gravitational energy
geothermal energy
Author: rikazzz Comment
Work and Energy
Anna carries a 12 kg bag upstairs to a height of 15 steps. If the height of each step is. 15.3 cm, then amount of work she has done is?
360 J
270 J
250 J
290 J
Author: rikazzz Comment
Everyday Science
In the process of rubbing hands, mechanical energy is converted into
kinetic energy
potential energy
thermal energy
heat energy
Author: rikazzz Comment
Everyday Science
The SI unit of power is
joules
newton
watt
omega
Author: rikazzz Comment
Work and Energy
If the velocity of a body becomes double, then its kinetic energy will
remain the same
become half
become four times
become double
Author: rikazzz Comment
Work and Energy
During interconversion of energy the total energy
remains constant
increases
decreases
becomes zero
Author: rikazzz Comment
Work and Energy
In nuclear power plants, we get energy as a result of
molecular reaction
potential reaction
nuclear reaction
fission reaction
Author: rikazzz Comment
Work and Energy
The potential energy stored in a body of mass 50 kg when it raised to height of 3 m is
500 J
1000 J
1500 J
100 J
Author: rikazzz Comment
Work and Energy
The change in the quality of the environment that can be harmful and unpleasant for living things is called
energy
pollution
revolution
transformation
Author: rikazzz Comment
Work and Energy
A block weighing 18 N is lifted 7 m vertically upward. The potential energy stored in it is
126 J
120 J
130 J
124 J
Author: rikazzz Comment

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