Imagine you are a NASA engineer, and you are asked to design an airbag to protect the Mars Pathfinder from its impact with the Martian plain when it lands. Your system can allow an average force of up to 53,000 N on the spacecraft without damage. Your Pathfinder mock-up has a mass of 540 kg. If the spacecraft will strike the planet at 24 m/s, what is the minimum time for your airbag system to bring Pathfinder to rest so that the average force will not exceed 53,000 N?

moving ball hits still ball. mover stops, hit ball moves. momentum transfer.

the answer is mosques. they are an important part of islamic culture.

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.