Kinematics Question 163

Question: A bird flies to and fro between two cars which move with velocities v1 = 20 m/s and v2 = 30 m/s. If the speed of the bird it’s v3 = 10 m/s and the initial distance of separation between theM is d= 2 km, find the total distance covered by the bird till the cars meet.

Options:

A) 2000 m

B) 1000 m

C) 400 m

D) 200 m

Show Answer

Answer:

Correct Answer: C

Solution:

[c] Time to meet the cars: t=dv1+v2

distance travelled by bird in this time s=v3t=v3dv1+v2=10×2000(20+30)=400m



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