- #1

Sophie Martinez

- 4

- 0

## Homework Statement

A bead is sliding on a surface. At point A it is 80 cm above the ground, at point B it has just hit the ground and at point C it is 50 cm above the ground. At point A it has a speed of 200 m/s, so what will its speed be at point B and C?

## Homework Equations

W=F.d

Kinetic Energy= (mv^2)/2

Gravitational potential energy= mass • 9.8 • height

## The Attempt at a Solution

I tried to find the the total mechanical energy at one point by adding the GPE and KE. At point B the GPE is 0, so the kinetic energy will be the total mechanical energy due to the conservation of energy. The mass is not given in this question and without the mass I cannot figure it out. I tried equating the work and energy equatipns but o got the wrong answer.