Question

if 5kg object is raised through a height of 4 m the work done by the force of gravity acting on the object is used 1 G is equal to 10 M per second square

Answer 1

We can write formula for work as below,

  Work = Force X Amount of movement of an object

  $W = F*d$------ (1)

In this question,

•   Force = F = weight of the object

               F= mass of the object X acceleration due to gravity

                $F = mg\\ F = 5*10\\ F = 50 N$

• Amount of movement of an object = 4 m

Substituting above values into equation (1),

     $W = 50* 4\\ W = 200 J$

Answer : work done by the force of gravity acting on the object = 200 J

   

Answer 2

We need to write down the necessary formulas.

The necessary formulas are given as :

The formula for getting force and the formula for getting work.

They are :

Work = Force × distance.  

Force =mg

where the m = Mass and g = acceleration due to gravity

We can work out the force as follows:

M = 5

g = 10

F = 5 × 10 = 50 N

In our case let the distance be d then it can be represented as :

d = 4 m

Doing the substitution to get work we have :

Work = 4 × 50 = 200 Joules  

= 200 Joules