Answer:
8.7975 Joules
Explanation:
Step one:
Given data
mass m= 0.5kg
height h= 1.5m
velocity v= 2.4m/s
The potential energy PE= mgh
The kinetic energy KE= 1/2mv^2
Step two
PE=0.5*9.81*1.5
PE=7.3575 Joules
KE= 1/2*0.5*2.4^2
KE=0.5*0.5*5.76
KE=1.44 Joules
The total mechanical energy is
PE+KE
=7.3575+1.44
=8.7975 Joules
