Question

A child weighing 40 kg jumps from a swimming pool board as high as 8 m above the water level. Calculate the speed of the child when touching the surface of the water. (g = 10 m / s²)

Answer 1

Known :

m = 40 kg

h = 8 m

g = 10 m / s²

Asked: Speed (v)

Settlement:

v² = 2. g. h

v² = 2. 10. 8  

v² = 160

v = √160

v = √16 x √10  

v = 4√10 m / s

So, the child's speed is 4√10 m / s

Mapel: Physics

Class: 8 Middle School

Material: Motion and Style

Keywords: Energy, speed