Question

Abus moves to the cast with a speed 10 ms, and a student in the bus moves with a speed 9 m/s to the cust. What is the velocity of the . relative to the bus A. 19 m/s to the cast B. 19 ms to the west c. 1 m/s to the east D. L us to the west.

Answer 1

Answer : The velocity of the student relative to the bus is 1 m/s to the east.

Explanation :

Relative speed : It is defined as the speed of a moving object when compared to the another moving object.

There are two condition of relative speed.

(1) It two bodies are moving in same direction then the relative speed will be the difference of two bodies.

`\text{Relative speed}=|V_2-V_1|`

(2) It two bodies are moving in opposite direction then the relative speed will be the sum of two bodies.

`\text{Relative speed}=V_1+V_2|`

As per question,

The speed of bus,
`V_1` = 10 m/s to east

The speed of student,
`V_2` = 9 m/s to east

In this problem, the two bodies are moving in same direction then the relative speed will be the difference of two bodies.

`\text{Relative speed}=|V_2-V_1|`

`\text{Relative speed}=|9-10|m/s`

`\text{Relative speed}=1m/s`

Therefore, the velocity of the student relative to the bus is 1 m/s to the east.