Thread: Power and Energy

Can someone help me with this problem? Thanks inadvance.

Skid is dragged kicking and screaming to Mike's Physics class. A force of 100 N is applied to Skid over a distance 50 m. If it takes 5 mins to do this, what is the power required? Must use energy methods to solve the problem

P = F d/t so first I tried plug in the values ? (50)/60 secs so I looking for F but what is F in this case. And how do I use energy methods in this case. Thanks again!!!!!!!!

Originally Posted by jsu03

Can someone help me with this problem? Thanks inadvance.

Skid is dragged kicking and screaming to Mike's Physics class. A force of 100 N is applied to Skid over a distance 50 m. If it takes 5 mins to do this, what is the power required? Must use energy methods to solve the problem

P = F d/t so first I tried plug in the values ? (50)/60 secs so I looking for F but what is F in this case.

...

Power = ( Force X Distance ) / Time
=

( 100 X 50 ) / (5 X 60 )

= 5000/3000
in joules per second

Well, you have probly done this already but I think they want you to consider the fact that Skid is traveling with a constant velocity(speed) ,as Power = Force X Velocity