A car is initially at rest, 330 m away from a stationary observer. it begins to move towards the observer with an acceleration of 1.1 m/s2 , sounding its horn continuously. After 20s, the driver stops sounding the horn. The velocity of sound in air is 330m/s. For how long will observer hear the horn? ans. 62/3s method?

Jitender Pal , 10 Years ago

Grade 9