A block is moved in a straight line from to

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

Problem

A block is moved in a straight line from

x=0

x=4\,\text{m}

. The force acting on the block is

5\,\text{N}

for the first

2\,\text{m}

and

3\,\text{N}

for the next

2\,\text{m}

, both directed along

+x

. Calculate the total work done by the force. (a)

8\,\text{J}

(b)

26\,\text{J}

(c)

16\,\text{J}

(d)

-16\,\text{J}