Question

8. Two engines cross each other in opposite
direction. One engine is whistling a frequency
of 540. People seating in another engine will
hear whistle of which frequencies when they
are approaching the first engine and when
have crossed the first engine. Both engines
are moving with a velocity of 40 meter per
second. Velocity of sound is 340 meter/
second​

Answer 1

Answer:

When the stone is released from elevator, the stone continues to move upwards due to inertia and thus speed of the stone just after it is released is u (upwards). Acceleration due to gravity g acts in the downward direction.When the stone is released from elevator, the stone continues to move upwards due to inertia and thus speed of the stone just after it is released is u (upwards). Acceleration due to gravity g acts in the downward direction.

Explanation: