Question

How much power is used to move a 25 kg mass 8 meters in 15 seconds?

Answer 1

`196` watts

Explanation:

Well first, we need to calculate the work done.

Work is defined by the equation

`W=F*d`

`F` is the force in newtons `(N)`

`d` is the distance in metres `(m)`

So, we need to find the weight of the object to get the force. It is given by the equation `W_"object"=m_"object"*g`, where `g` is gravitational acceleration

`W_"object"=25kg*9.81=245.25N~~245N`

`m=8m` (given)

`:.W=245N*8m=1960N \ m = 1960J`

So, the work done is `1960J`. To find the power, we take the work done and divide it by a certain amount of time.

The equation is

`P=W/t`

`:.P=(1960J)/(10s)=196J \ s^-1=196W`

So, the power done is `196` watts.