A block on a horizontal

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

Problem

5\,\text{kg}

block on a horizontal, frictionless surface is subjected to two constant forces. Force

\vec F_1

has magnitude

20\,\text{N}

and acts at

30^{\circ}

above the

+x

-axis. Force

\vec F_2

has magnitude

15\,\text{N}

and acts at

120^{\circ}

counter-clockwise from the

+x

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

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

(b)

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

(c)

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

(d)

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