Khalifa

A bullet of mass 45 g is fired at a speed of 220 m/s into a 5.0-kg sandbag hanging from a string from the ceiling. The sandbag absorbs the bullet and begins to swing. To what maximum vertical height will it rise? Hint: Energy is not conserved as the bulle...

30 red socks, 22 gold socks and 14 black socks. How many socks would he have to pick up before getting a matching pair?

v1'=((m1-m2)/(m1+m2))v1 for the bullet =176ms^-1 And for the sandbag at rest v2'=((2m1)/(m1+m2))v1 =396ms^-1 The bullet is conserved after the bullet comes to rest in the bag. Hence Mgh= 1/2mv^2. I got stuck here what is going to be the value of M, is it...