Question

Elsa is sitting very still on a chair. But Jose claims that elsa is actually moving. Jose is true if the point of reference is the? A. Chair
B. Floor
C.Earth
D. Sun

Answer 1

Answer:

d.sun

Explanation:

Answer 2

Jose is true if the point of reference is the Sun.

Explanation:

1. Relative Velocity of object 2 with respect to 1

   $V_{2-1}= V_{2}-V_{1}$     ...1)

   $V_{1}$ = absolute velocity of object 1 which is point of reference

   $V_{2}$ = absolute velocity of object 2= Velocity of Elsa

2. Taking Elsa and chair

    As Elsa is sit on chair and Elsa is not have motion on chair. So velocity of Elsa and chair will be same.

  So relative velocity of Elsa with respect to chair is zero.

3. Taking Elsa and floor

   As Elsa is sit on chair where chair is put on floor, chair is not move on floor.

   Means velocity of Elsa, chair and floor is same.

   So relative velocity of Elsa with respect to floor is zero.

4.  Taking Elsa and Earth

    As floor is also  part of earth. So velocity of Elsa, chair, floor and earth is same magnitude.

    So relative velocity of Elsa with respect to Earth is zero.

5. Taking Elsa and Sun

   As Earth is moving with respect to sun.

   It means floor of earth is also moving with respect to Sun.

   It also means chair is also moving with respect to Sun.

   Now we can say that Elsa is also moving with respect to Sun.

6. It is clear that point of reference on Sun