Question

A force $\vec { F } = 6 \hat { i } + 2 \hat { j } - 3 \hat { k }$ acts on a particle and produces a displacement of $\vec { s } = 2 \hat { i } - 3 \hat { j } + x \hat { k }$ If the work done is zero, the value of x is

• A. – 2
• B. 1/2
• C. 6
• D. 2

Answer 1

Answer: (D)

2

Answer 2

$12 - 6 - 3 x = 0$ ⇒ $x = 2$