Question
Question: A box of mass 1 kg is pulled on a horizontal plane of length 1 m by a force of 8 N then it is raised...
A box of mass 1 kg is pulled on a horizontal plane of length 1 m by a force of 8 N then it is raised vertically to a height of 2m, the net work done is
A
28 J
B
8 J
C
18 J
D
None of above
Answer
28 J
Explanation
Solution
Work done to displace it horizontally = F × s = 8 × 1
= 8 J
Work done to raise it vertically F × s = mgh = 1 × 10 × 2
= 20 J
∴ Net work done = 8 +20 = 28 J