Matthew walked eastward with a speed of 3.45 m/s. If it takes them 54 seconds to walk to the store, how far have they walked?

d =  186.3 m

Explanation:

Given that,

Speed of Matthew 3.45 m/s due eastward

It takes 54 seconds to walk to the store.

We need to find the distance covered. The product of speed and time is equal to the distance covered.

d = vt

Putting all values,

d = 3.45 m/s × 54 s

d = 186.3 m

Hence, he will cover a distance of 186.3 m.

c

explanation:

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.