A cart is initially at rest on a frictionless track

PHYSICS · Single correct · CBSE · Physics · Force and Laws of Motion · Force and Laws of Motion

Problem

3.0\,\text{kg}

cart is initially at rest on a frictionless track. A constant horizontal force of

6.0\,\text{N}

to the east acts on the cart for

0.20\,\text{s}

, after which the net horizontal force is zero for the next

1.0\,\text{s}

. Finally, a

6.0\,\text{N}

force to the west acts for

0.10\,\text{s}

. What is the magnitude and direction of the cart’s velocity at

t = 1.30\,\text{s}

? (a)

0.60\,\text{m/s}

east (b)

0.20\,\text{m/s}

east (c)

0.20\,\text{m/s}

west (d)

0.40\,\text{m/s}

east