Question

If force $( \vec { F } ) = 4 \hat { i } + 5 \hat { j }$ and displacement then the work done is

• A. $4 \times 3$
• B. $5 \times 6$
• C. $6 \times 3$
• D. $4 \times 6$

Answer 1

Answer: (A)

$4 \times 3$

Answer 2

$= ( 4 \hat { i } + 5 \hat { j } ) ( 3 \hat { i } + 6 \hat { j } ) = 12$