Three small pucks rest on a frictionless horizontal surface at the positions ,

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

Problem

Three small pucks rest on a frictionless horizontal surface at the positions

(0,0)\,\text{m}

(0,2)\,\text{m}

, and

(4,0)\,\text{m}

, with masses

2\,\text{kg}

1\,\text{kg}

, and

3\,\text{kg}

, respectively. Starting at

t=0

, a constant

6\,\text{N}

force directed along

+x

is applied to the

2\,\text{kg}

puck, and simultaneously a constant

8\,\text{N}

force directed along

+y

is applied to the

1\,\text{kg}

puck. The forces are applied for

2.0\,\text{s}

and then removed. What is the magnitude of the velocity of the center of mass immediately after the forces are removed? (a)

4.7\,\text{m}\!/\!\text{s}

(b)

3.3\,\text{m}\!/\!\text{s}

(c)

2.0\,\text{m}\!/\!\text{s}

(d)

6.0\,\text{m}\!/\!\text{s}