A block of mass is pulled along a straight horizontal track from to

PHYSICS · Multi-part · CBSE · Physics · Work, Energy and Power · Work, Energy and Power

Problem

A block of mass

2\,\text{kg}

is pulled along a straight horizontal track from

x = 0

x = 6\,\text{m}

. For the first

3\,\text{m}

the horizontal force on it is constant

4\,\text{N}

; for the next

3\,\text{m}

the force suddenly changes to constant

2\,\text{N}

in the same direction. The block starts with a speed of

2\,\text{m\,s}^{-1}

x = 0

. (i) Total work done (ii) Speed at

x = 6\,\text{m}