A shipping box of mass is placed on a lightweight dolly of mass

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

Problem

A shipping box of mass

8.0\,\text{kg}

is placed on a lightweight dolly of mass

2.0\,\text{kg}

. A worker pushes horizontally so that the box–dolly system experiences a net force of

25\,\text{N}

. Neglecting friction, what is the magnitude of the system's acceleration? (a)

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

(b)

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

(c)

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

(d)

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