CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A 100 m train is moving North at a speed of 16 ms1. A bird flying at 4 ms1 towards South crosses the train in

A
5s
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
10s
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
12s
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
20s
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A 5s

Given,

Take direction of velocity in south direction is positive.

Velocity of bird, vb=4ms1

Velocity of train, vt=16ms1

Relative velocity of bird w.r.t train, vbt=4(16)=20ms1

Time = train length / bird relative velocity

t=10020=5sec

Hence, time to cover train length is 5sec


flag
Suggest Corrections
thumbs-up
1
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Equations of Motion
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon