Physics

Problem

2\,\text{kg}

block is released from rest at the top of a smooth plane

5\,\text{m}

long that is inclined at

30^{\circ}

to the horizontal. Take

g = 10\,\text{m}\,\text{s}^{-2}

. The time taken by the block to reach the bottom of the plane is closest to a)

1.0\,\text{s}

1.4\,\text{s}

0.7\,\text{s}

2.0\,\text{s}