Question

The average power required to lift a $100kg$ mass through a height of $50$ metres in approximately $50$ seconds would be ( in J/s)

• A. $50$
  
• B. $5000$
  
• C. $100$
  
• D. $980$
  

Answer 1

The correct option is D $980$

$Power=Work/Time=F.s/t=mgs/t=(100\times 9.8\times 50)/50=980W$

Hence correct answer is option $D$