Question

An electric motor create a tension of 4500 Newton in a cable on lifting a certain weight and wrapped at a rate of 2m/s.The power of motor is

Answer 1

Hello Dear,

Your answer is here.

Given conditions,

                Force (F)  =  4500 N 
                Velocity (v) = 2 m/s

           We know,   Power= Work/time
 Also   
           Work =force x displacement 
           Thus power =( force x displacement ) ÷ Time


  Since,  Displacement/Time = Velocity 
   
              Thus, Power=  Force x Velocity

              Power= 4500 × 2
                        =9000 W

Thus , The power of Motor is 9000 W.


I hope it Helps.

Have a Marvelous Day :-)

Answer 2

Given :

Tension force = 4500N

Velcoity= 2m/s

Power =?

Formula to be used :
Power= workdone/time------------(1)

Where as work done= Force x displacement

But we know that Velocity= displacement /time

equation(1)⇒power = Force x displacement / time

power= force x velocity
 Power = 4500 x 2
=9000W

∴ Power of motor  is 9000W