Answer:
Therefore F ∠2.5N
Explanation:
Definition of Work:
It is the amount of energy transferred.
Mathematical expression:
W = F × d
By taking the friction into count it will define as:
Input work = work against friction ×  output work
No we will put the values:
25 J = w + 10 m
j = kg m²/s²
25 kg m²/s² =  w + 10 m
when friction is exist then w > 0
25 kg m²/s² - 10 m  > 0
15 N > 0
Therefore F ∠2.5N
