Question

pls answer question no. 5
its urgent

Answer 1

answer is 40 joules 
work done = F × s
   
(F=m×v) 
∴ work done = m×v×s
                       2 × 0.5 × 40
                           1 × 40 
                             40 joules 

hope u like this 
pls brainliest if u like