A block starts from rest at point

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

Problem

1\,\text{kg}

block starts from rest at point

A

, which is

5\,\text{m}

above ground level, slides down a smooth track, and then moves up a second smooth ramp to point

B

, which is

2\,\text{m}

above the ground. Ignoring friction and taking

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

, determine the speed of the block when it reaches point

B

. (a)

10\,\text{m/s}

(b)

7.7\,\text{m/s}

(c)

5.5\,\text{m/s}

(d)

6.3\,\text{m/s}