A block is pulled up a incline by a rope parallel to the surface

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

Problem

5.0\,\text{kg}

block is pulled up a

25^{\circ}

incline by a rope parallel to the surface. The coefficient of kinetic friction between the block and the incline is

0.15

, and the tension in the rope is

45\,\text{N}

. Take

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

. What is the magnitude of the block’s acceleration? (a)

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

(b)

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

(c)

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

(d)

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