1. An airplane is traveling at 225 m/s when it strikes a weather balloon (m = 1.82 kg), which can be considered to be at rest relative to the ground below. After the collision, the balloon is caught on the fuselage and is traveling with the airplane. The collision takes place over a time interval of 4.44 ´ 10-3 s. What is the average force that the balloon exerts on the airplane?

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we need to know the time interval during which the force acts. impulse of force = momentum change