Download App

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

Rajasthan 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→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

The cross-sectional areas of two rods made of the same metal are equal. The length of one rod is 40 cm and the temperature difference at its ends is $120^{\circ}\text C $ and the length of the other rod is 60 cm and the temperature difference at its ends is $120^{\circ}\text C $. Give the necessary calculations and tell which rod will have the higher rate of heat conduction?
→
In a factory it is desired to lift 2000kg of metal through a distance of 12m in 1 minute. Find the minimum horsepower of the engine to be used.
→
A ball is projected from a point on the floor with a speed of 15m/s at an angle of 60° with the horizontal. Will it hit a vertical wall 5m away from the point of projection and perpendicular to the plane of projection without hitting the floor? Will the answer differ if the wall is 22m away?
→
Read statement below carefully and state with reasons and examples, if it is true or false;
A particle in one-dimensional motion.
With zero speed at an instant may have non-zero acceleration at that instant.
→
If no external force is acting on a two body system, what will happen to:
  1. Velocity of COM?
  2. Angular momentum?
→
Show graphically the change of potential energy and kinetic energy of a block attached to a spring which obeys Hooke's law.
→
How much is KE for displacement equal to half the amplitude?
→
Why are space crafts usually launched from west to east? Why is it more advantageous to launch rockets in the equatorial plane?
→
A person driving a car suddenly applies the brakes on seeing a child on the road ahead. If he is not wearing seat belt, he falls forward and hits his head against the steering wheel. Why?
→
A boy is standing on a platform which is free to rotate about its axis. The boy holds an open umbrella in his hand. The axis of the umbrella coincides with that of the platform. The moment of inertia of ''the platform plus the boy system'' is 3.0 × 10-3kg-m2 and that of the umbrella is 2.0 × 103kg-m2. The boy starts spinning the umbrella about the axis at an angular speed of 2.0rev/s with respect to himself. Find the angular velocity imparted to the platform.
→