Question

A brick of mass 10kg is raised from a height of 6m above the ground. calculate the kinetic energy of the brick when it is at a height of 2m above the ground

Answer 1

when it is at 6m above the ground, it's total energy=,mgh+0 ( coz kinetic energy is zero)

now when,its height decreases then, it's potential energy will be converted to kinetic energy

6×10×10-6×10×4=1/2×10×v^2

6×10×6×2/10=V^2

V=√72

hope it helps