Answer:
In the explanation
Explanation:
<u>Experiment</u>:
Consider two billiard balls of masses ‘m₁’ and ‘m₂’, moving with velocities ‘u₁’ and ‘u₂’, respectively, such that u₁ is greater than u₂. After some time, these balls collide with each other and their velocities become ‘v₁’ and ‘v₂’, respectively.
<u>Observation</u>:
The masses of balls should be measured and their initial and final velocities should be measured.
<u>Result</u>:
In order to prove law of conservation of moment following equation must be satisfied by observed values:

Answer: im sure its <u>A only </u>
Answer:
AU
Explanation:
Astronomical units are used to measure the distances within solar system
Answer:
a large matters of body with no shape is mass
Answer:
Part a)

Part b)

Part c)

Explanation:
Part a)
As we know that there is no external torque on the system of two twins
so here we will use



Part b)
Since angular momentum is conserved here as there is no external torque
so we will have



Part c)
Work done by both of them = change in kinetic energy
so we have



