Block ( ) rests on top of block ( )

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

Problem

Block

C

(

2.0\,\text{kg}

) rests on top of block

D

(

4.0\,\text{kg}

), which in turn slides on a horizontal floor. The coefficient of static friction between

C

and

D

\mu_{s}=0.50

, while the coefficient of kinetic friction between

D

and the floor is

\mu_{k}=0.20

. A horizontal force of

25\,\text{N}

is applied to block

D

toward the right. What is the acceleration of block

C

? (Take

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

.) (a)

4.3\,\text{m/s}^2

to the right (b)

2.9\,\text{m/s}^2

to the right (c)

2.2\,\text{m/s}^2

to the right (d)

1.3\,\text{m/s}^2

to the right