Question

an object of mass 20kg is dropped from a height of 4m.and kinetic energy and potential energy​

Answer 1

Answer:

800 J, 0J

Explanation:

hight = 4m

v= 0m/s as dropped from hight

potential energy =. m×g×h

= 20×10×4

= 800 J

kinetic energy= 1/2 mv2

= 1/2(20)(0)^2

= 0

total energy = 800 +0

= 800 J

Answer 2

Answer:

kinetic energy =1/2mv^2

=1/2*20*10*10

=1000kgms^2

potential energy =mgh

=20*10*4

=800kgms^2

Explanation:

mass=20 kg

velocity in free fall is both 10 and 9.8,i have taken 10 for simplification.

velocity=g

g=acceleration during free fall