Question

A block of mass $5 kg$ moves along the $x-$direction subject to the force $F = (−20x + 10) N,$ with the value of $x$ in metre. At time $t = 0 s,$ it is at rest at position $x = 1 m$. The position and momentum of the block at $t = (\pi/4)$ s are

• A. $-0.5m,5kg \ \frac{m}{s}$
• B. $0.5m,0kg \ \frac{m}{s}$
• C. $0.5m,0kg \ \frac{m}{s}$
• D. $0.5m,0kg \ \frac{m}{s}$

Answer 1

Answer: (C)

$0.5m,0kg \ \frac{m}{s}$

Answer 2

The correct option is (C):$0.5m,0kg \ \frac{m}{s}$