Download App

Work, Energy, and Power — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsWork, Energy, and Power2 Marks
Question
A shell explodes while at rest. Discuss the momentum and energy conservation in the explosion.
✓

Answer

As the shell explodes, while being at rest, the momentum after explosion should also be zero. The internal energy with the shell will provide kinetic energy to the pieces into which it is broken. Therefore, there is increase in kinetic energy at the loss of internal energy.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "2 Marks Questions" from Work, Energy, and Power→Work, Energy, and Power — all question types→Physics STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

What do you understand by damped oscillation?
→
Does the change in gravitational potential energy of a body between two given points depend upon the nature of path followed, why?
→
A steel wire fixed at both ends has a fundamental frequency of 200Hz. A person can hear sound of maximum frequency 14kHz. What is the highest harmonic that can be played on this string which is audible to the person?
→
A wire of length L and radius r is clamped rigidly at one end. When the other end of the wire is pulled by a force f, its length increases by I. Another wire of the same material of length 2L and radius 2r, is pulled by a force 2f. Find the increase in length of this wire.
→
In a vessel 80 cm . A gas is filled at the pressure of mercury and at a certain temperature. At the same temperature the mass of the vessel is increased by $60 \%$ by filling more gas in it. Calculate the resultant pressure in the vessel.
→
Why are space crafts usually launched from west to east? Why is it more advantageous to launch rockets in the equatorial plane?
→
A small drop of water of surface tension T is squeezed between two clean glass plates so that a thin layer of thickness d and area A is formed between them. If the angle of contact is zero, what is the force required to pull the plates apart.
→
At what temperatures ($in ^oC$) will the speed of sound in air be 3 times its value at $O^oC$?
→
Ravi came to stay in a multistoried building. He noticed that motor supplying water to the second floor is power rating $\text{X k W}$ while of that supplying water to $8^{th}$ floor is $\text{Y k W}$. He asked his father the reason behind the difference of the power ratings. His father explained him the reason.
  1. What values does Ravi posses?
  2. Which power rating is more $X$ or $Y\ ?$
  3. A motor pumps up $1000\ kg$ of water through a height of $10$ min $5 s$. If the efficiency of the motor is $60\%$, calculate the power of the motor in kilowatt.
→
Define critical velocity.
→