A man runs towards a stationary mirror at a speed 15 m/s. The speed of the image relative to the man is
A
15 ms−1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
30 ms−1
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
35 ms−1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
20 ms−1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution
The correct option is B 30 ms−1 Given that speed of the man is 15 m/s
The image in the plane mirror runs as fast as the man when viewed by a third person.
As the image and the man run in opposite directions, speed gets add up.
But speed with respect to man is 15−(−15)=30m/s