A cart moves at to the right and catches up to a cart moving at in the same direction

PHYSICS · Single correct · CBSE · Physics · Work, Energy and Power · Work, Energy and Power

Problem

0.60\,\text{kg}

cart moves at

3.0\,\text{m/s}

to the right and catches up to a

0.40\,\text{kg}

cart moving at

2.0\,\text{m/s}

in the same direction. The carts collide and lock together. While they are in contact, a

0.20\,\text{N}

horizontal force from air resistance acts opposite their motion for

0.050\,\text{s}

. What is the speed of the joined carts immediately after the collision? (a)

2.40\,\text{m/s}

to the right (b)

2.59\,\text{m/s}

to the right (c)

2.60\,\text{m/s}

to the right (d)

2.50\,\text{m/s}

to the right