1-13+blake

Today In physics we did three daily questions, having to do with impulse and momentum. The first one was about Jacko, who had a mass of 60kg and stands at rest on ice, catches a 20kg ball that is thrown to him at 110km/h. How fast does Jacko and the ball move across the ice? Pb=Pa 200+0= 200

The next daily question was: Strictly speaking, when a gun is fired, compared with the momentum of the recoiling gun, the opposite momentum of the bullet is: a) Less b) More c) The same The answer is a, less. The answer is less because the weight of the gun is a lot more then the weight of the bullet so it will not be moving as fast.

The third and last dailey question has to do with an ice sailcraft, an ice sailcraft is stalled on a frozen lake on a windless day. A large fan blows air into the sail. If all the wind produced by the fan strikes and bounces backward from the sail, the craft will move: a) To the left (back) b) To the right (forward) c) Not at all The answer is b, to the right because the air bounces off creating force.