Question

Help me pls. and explain it to me

Answer 1

Step-by-step explanation:

At Q all of the potential energy (mgh) from point P is converted to KINETIC energy (1/2 mv^2)

so

mgh = 1/2 mv^2 <=====solve for 'v'

gh = 1/2 v^2

2 gh = v^2

v = sqrt ( 2gh) = sqrt ( 2 * 9.81 * .10 ) = 1.4 m/s