A bullet traveling horizontally embeds in a cart that is initially at rest on a…

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

0.020\,\text{kg}

bullet traveling

300\,\text{m/s}

horizontally embeds in a

2.0\,\text{kg}

cart that is initially at rest on a horizontal track. Immediately after the collision, the cart slides onto a

0.50\,\text{m}

-long rough section and comes to rest at the end of that section. Assuming the coefficient of kinetic friction

\mu_k

is constant on the rough section and negligible elsewhere, which value is closest to

\mu_k

? (a)

0.60

(b)

0.18

(c)

0.90

(d)

0.45