A block is released from rest at the top of a rough incline long that makes an angle…

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Work Energy and Power · Work Energy and Power

Problem

2\,\text{kg}

block is released from rest at the top of a rough incline

10\,\text{m}

long that makes an angle

\theta

with the horizontal such that

\sin\theta = 0.50

. The coefficient of kinetic friction between the block and the incline is

0.20

. Take

g = 9.8\,\text{m s}^{-2}

. Calculate the speed of the block when it reaches the bottom of the incline. (a)

10\,\text{m s}^{-1}

(b)

7.7\,\text{m s}^{-1}

(c)

8\,\text{m s}^{-1}

(d)

8.9\,\text{m s}^{-1}