In attempting to pull a 1500-kg car out of a ditch, arnold exerts a force of 300 n for three seconds, bob exerts a force of 500 n for two seconds, and cecil exerts a force of 200 n for four seconds. who provided the greatest impulse?

So Bob provide maximum impulse to the car

Explanation:

As we know that impulse is defined as change in momentum

so here we have

so here we can say that

1), Arnold exerts a force of 300 N for three seconds,

So impulse due to force of Arnold

2). Bob exerts a force of 500 N for two seconds,

So impulse due to force of Bob

3). Cecil exerts a force of 200 N for four seconds.

So impulse due to force of Cecil

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.