If a 100n force has a 60-degree angle pulling on a 10kg block for 5m, what's the work done on the object

250J

Explanation:

Given parameters:

Force on block = 100N

Degree of pull  = 60°

Mass of block  = 10kg

Distance  = 5m

Unknown:

Work done on the object = ?

Solution:

The workdone on a body is the force applied to move a body in a specific direction;

  Workdone  = force x distance cos Ф

Insert the parameters and solve;

     Workdone  = 100 x 5 cos 60°

    Workdone  = 250J

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.