Why, when you release an inflated but untied balloon, does it fly across the roo

Question

Why, when you release an inflated but untied balloon, does it fly across the room? Answer in terms of momentum. Two objects have different masses but the same linear momenta. If you stop them with the same retarding force, which one will stop in the shorter distance? Explain. An astronaut training at the Craters of the Moon in Idaho jumps off a platform in full space gear and hits the surface at 5 m/s. If later, on the Moon, the astronaut jumps from the landing vehicle and hits the surface at the same speed, will the impulse be larger, smaller, or the same as that on Earth? Explain. Is it possible for an object to have momentum without having kinetic energy? Can it have kinetic energy but no momentum? Explain. Can the speed of an object change if the net work done on it is zero? Explain. Two Olympic figure skaters, Tonya Hard-fling and Nancy Care-again, collided in mid-air during practice. Their knee-jerk reaction was to hold onto each other so that immediately after impact they continued their motion in mid-air with a common velocity, having no rotation. Both skaters were travelling horizontally above the ice immediately before impact. Tonya, of mass 45 kg, was moving due North at a speed of 21 m/s. Nancy, of mass 55 kg, was moving [E30 degree S] at a speed of 14 m/s. Calculate the percentage of total kinetic energy lost by the pair during the collision.

Explanation / Answer

Since questions are not related to each other so solving first 2 questions

1

The flying of ballon will depend on the gas it is filled with ,if it is filled with gas lighter than air ,than it will fly otherwise not .The reason is that as density of filled gas is less,the upthrust will be more in ballon forcing it to fly upwards .

2

As momentum is same

we know Force*time=change in momentum

as momentum change is same in both and also F is same so time will also be same .

so both will require same time

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