Respuesta :

samuraijack
There are two ways to solve this problem. First we write the given.

Given: Force F = 400 N;  Height h = 0.5 m;  Time t = 2 s

Formula: P = W/t;  but Work W = Force x distance or W = f x d
 
Weight is also a Force, therefore:  W = mg, solve for Mass m = ?

m = w/g  m = 400 N/9.8 m/s²  m = 40.82 Kg

P = W/t = F x d/t  = mgh/t  P = (40.82 Kg)(9.8 m/s²)/2 s  

P = 100 J/s or 100 Watts

Lanuel

The power of the weight lifter is 100 Watts.

Given the following:

  • Weight = 400 Newton
  • Height = 0.5 meters
  • Time = 2 seconds

To find the power of the weight lifter:

First of all, we would determine the work done by the weight lifter by using the formula;

[tex]Work \; done = mgh[/tex]

But, [tex]Weight = mg = 400[/tex]

[tex]Work \; done = 400(0.5)[/tex]

Work done = 200 Joules.

Now, we can find the power of the weight lifter by using the formula:

[tex]Power = \frac{Work \; done}{Time}[/tex]

[tex]Power = \frac{200}{2}[/tex]

Power = 100 Watts.

Therefore, the power of the weight lifter is 100 Watts.

Read more: https://brainly.com/question/19116478

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