Question

A 10 kg weight is raused to a height of 2 m wth an acceleration of 1.5 m/sec square .compute the work done if g = 10 m/sec square

Answer 1

Potential energy at 2m= mgh= 10×10×2 =200j
kineric energy = .5 × m× v ^2
maximum velocity=
v^2=u^2+2as
u is initial velocity
v is final velocity
s is displacement
a is acceleration
u=0
v^2=2×1.5×2
=6
kinetic energy= .5×10×6= 30j
total energy= potential+kinetic=230j