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What is the recoil velocity of the pistol when a bullet of mass 20g is fired with a velocity 150ms from a pistol of mass 2kg?
Wiki User
∙ 12y ago
Momentum before = momentum after.
Since there was no movement before, momentum before = 0
If you think of the bullet as forward/positive momentum and the gun as backward/negative momentum then the momentum of the bullet plus the momentum of the gun =0
and therefore the momentum of the bullet = the momentum if the gun.
momentum = mass x velocity P=m/v
20gx150m/s = 2000g (2kg) x velocity
3000 = 2000v
3000 / 2000 = v
v = 1.5m/s
Wiki User
∙ 12y ago
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A baseball is hit straight up at an initial velocity of 150MS. what will be the baseballs speed when it hits the ground?
20.40
Why do the Chinese not use lane 1 in the Olympics?
I remember reading somewhere that they had moved people to the 2nd lane to cut down on the "loud gun" syndrome in the Olympics Normal track events there is a tone that is played in the runners starting shoe. This means everyone gets the tone at the same time. The starter gun is, in this case a prop to set of the tone. In the Olympics they still use a "loud gun" which means it is a single point of noise that reaches the person in the first box 150ms before the person in the 8th box can hear it. Moving a person to the 2nd box apparently cuts this "lead" down in half, and also cuts down on the "surprised shock" start. Basically the gun is LOUD. and someone close to it gets up to 20-30ms head start as well. Yes in total we are not even talking 200ms head start, but in the games, every second... and millisecond counts. I remember reading somewhere that they had moved people to the 2nd lane to cut down on the "loud gun" syndrome in the Olympics Normal track events there is a tone that is played in the runners starting shoe. This means everyone gets the tone at the same time. The starter gun is, in this case a prop to set of the tone. In the Olympics they still use a "loud gun" which means it is a single point of noise that reaches the person in the first box 150ms before the person in the 8th box can hear it. Moving a person to the 2nd box apparently cuts this "lead" down in half, and also cuts down on the "surprised shock" start. Basically the gun is LOUD. and someone close to it gets up to 20-30ms head start as well. Yes in total we are not even talking 200ms head start, but in the games, every second... and millisecond counts.
