A block is connected by a light string over a frictionless pulley to a hanging mass

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Force and Translational Dynamics · Force and Translational Dynamics

Problem

3.0\,\text{kg}

block is connected by a light string over a frictionless pulley to a hanging mass

m

. The block rests on an incline that makes an angle of

20^{\circ}

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

0.20

. If the system is released from rest and is to move at constant speed, which value of

m

is required? (Use

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

.) (a)

2.2\,\text{kg}

(b)

1.0\,\text{kg}

(c)

1.6\,\text{kg}

(d)

2.8\,\text{kg}