NTA Abhyas 2020
- Exam
- NTA Abhyas
- Year
- 2020
- Subject
- Physics
- Chapter
- Motion in Two Dimensions
NTA Abhyas 2020 · Physics · Motion in Two Dimensions
A car A is moving with speed 40kmh^ - 1 along a straight line 30 °...
A car A is moving with speed along a straight line north of east and another car B is moving with same speed along a straight line south of east. The relative velocity of car A as observed from the car B is
Options
- A& north-east
- B& south
- C& north
- D& south-east
Correct answer
C. & north
Step-by-step solution
\overset{→}{V}A = 40cos {30}^{o}\overset{^}{i} + 20\overset{^}{j}
{\overset{→}{V}}_{B} = 40cos {30}^{o}\overset{^}{i} - 20\overset{^}{j}
∴ \overset{→}{V}AB = \overset{→}{V}A - \overset{→}{V}B = 40\overset{^}{j}
The relative velocity of car A as observed from car B is & north