Question

5
24. (a) State conservation law of angular momentum give one example of
it. (2) (b) Explain any three fundamental force in nature and write there any
one role in universe. (3)
ACHIE​

Answer 1

Answer:

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Explanation:

1. An example of conservation of angular momentum is seen in an ice skater executing a spin, as shown in. ... Conservation of Angular Momentum: An ice skater is spinning on the tip of her skate with her arms extended. Her angular momentum is conserved because the net torque on her is negligibly small.

2. There are four fundamental forces in nature which are Gravitational force, Strong force, Weak force and Electromagnetic force. These forces prevent the drifting of matter in the universe and helps keep it together. ... This force is always attractive acts between any two pieces of matter in nature.

Answer 2

Explanation:

a)The law of conservation of angular momentum states that when no external torque acts on an object, no change of angular momentum will occur.

Some examples of momentum:

• The Earth continues to spin at the same rate it has for billions of years
• A high-diver who is “rotating” when jumping off the board does not need to make any physical effort to continue rotating, and indeed would be unable to stop rotating before hitting the water.

b)Gravitational Force:

• This force is the weakest but has an infinite range. It has strength of 6 × 10^-39 in comparison to the strength of the strong force. This force is always attractive acts between any two pieces of matter in nature. The effect of this gravitational force is dependent upon the mass of the two bodies and the distance between them.

Strong nuclear force:

• This force holds the nucleus of an atom together. It is the strongest of the forces, but it is very short ranged. It acts over a range of about 10-15m, which is the average diameter of a medium sized nucleus. This force is attractive.

Electromagnetic Force:

• This is the second strongest force after the strong force and it acts on electrically charged particles. It has strength of 1/137 relative to the strong force but has an infinite range. However, this force has both attractive and repulsive properties due to the two charges it possesses; negative and positive. Like charges repel while unlike charges attract and this can be demonstrated with a simple magnet or electric charges.

one role of nuclear force in universe:

It binds the fundamental particles of matter together to form larger particles.

one role of gravity in universe:

Gravity is what holds the planets in orbit around the sun and what keeps the moon in orbit around Earth.

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