A mass of 2 g initially at Rest Travels for 4 sec with and acceleration of 1.5m/s2.The gain of momentum of the body is: This question was posted by Thushar Goyal. Answer: Taking u = 0 m/s, a= 1.5 m/s2 and t = 4 s calculate v v=u+at =6m/s masss, m = 2...

## A numerical problem from Beats

Nithya asks:

- “A source of sound frequency 256Hz is moving rapidly towards a wall with a velocity of 5m/s. How many beats per second will be heard if sound travels at a speed of 330m/s?”
- a