Marissa uses a cart to haul flowers at her job with a landscaper. She pushes a 12-kilogram cart a distance of 6 meters with a force of 25 Newtons. How much work does she do?

150J

Explanation:

The following data were obtained from the question:

M (mass) = 12Kg

F (force) = 25N

d (distance) = 6m

w (work) =?

Work is defined as the product of force and distance moved in in the direction of the force. It is measured in joules and can be represented mathematically as:

work = force x distance

w = F x d

w = 25 x 6

w = 150J

Therefore, 150J of work is done

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.