Question

Sam is moving house and is carrying a 300N box of books up a flight of steps 5m high, it takes her 30 seconds. Gary follows her carrying a bag of clothes doing 1000 J of work; it only takes him 25 seconds. Who provides the biggest power? Show your working.

Answer 1

Sam is providing the biggest power i.e. 50 W

Step-by-step explanation:

Sam is moving house and is carrying a 300N box of books up a flight of steps 5m high, it takes her 30 seconds.

Sam's power :

`P_1=(W_1)/(t_1)\\\\P_1=(F_1d)/(t_1)\\\\P_1=(300* 5)/(30)\\\\P_1=50\ W`

Gary follows her carrying a bag of clothes doing 1000 J of work; it only takes him 25 seconds.

Gary's power :

`P_2=(W_2)/(t_2)\\\\P_2=(1000)/(25)\\\\P_2=40\ W`

So, it is clear that Sam is providing the biggest power.