Question

Let $\overrightarrow r_P(t)=3t\hat i+4t²\hat j$ and $\overrightarrow r_Q(t)=4t^2\hat i+3t\hat j$ represent the positions of particles P and respectively as function of time t. The relative speed of the two particles at the instant t = 1 sec will be [consider $\overrightarrow r_P(t)$ and $\overrightarrow r_Q(t)$ are in metres and t is in seconds]

• A. 11√2 m/s
• B. 5√2 m/s
• C. 3√2 m/s
• D. 1 m/s

Answer 1

Answer: (B)

5√2 m/s

Answer 2

The correct option is (B): 5√2 m/s